I think the key difference between China and Indonesia are:

1. Despite having some minorities, China is mainly Han Chinese.

While non-Hans are less than 10% of population, they still amount to some 100 million, a huge number by any standard. When you have 100 million people unhappy with the Han Chinese rule, troubles arise.

2. China does not have religious tensions like in Indonesia where religion is fueled and/or is fuelling ethnic and other conflict.

Surely China does. Never heard of Tibetan Buddhism and Islam of Uyghurs and Huis?

In fact, China’s permitting Western missionaries in Tibet to create a religious conflict between Tibetan Buddhism and Christianity in Tibet and weaken the Tibetans. http://world.time.com/2013/03/08/good-lord-in-china-christian-fundamentalists-target-tibetans/

Gladly.
2. There are over 100 antennas of various functions on the KJ-2000, making it the world’s most capable AWAC.

Non-sense.

3. KJ-2000 uses 3 AESA radars, claimed to be the best in the world.

Non-sense again.

4. AWACs have a history of some 70 years dating back to WW2. The Chinese used only 40 years to develop some of the best AWACs in the world.

Non-sense three times.

Chinese are literally decades behind the West in avionics; this is according to foreign customers of Chinese weapons like Pakistan.

http://www.montrealgazette.com/news/national/design+increases+risk+being+shot+down+pilots+warn/8057864/story.html

The pilots, all of whom had at least 1,000 hours in other U.S. fighter jets, complained that the radar was often not working, their state-of-the-art helmets gave them double-vision or blurry vision, and their flight suits were too hot.

They also blasted a design feature that made it difficult if not impossible to see “aft,” or behind them — a serious threat to the aircraft’s ability to fight.

“The head rest is too large and will impede aft visibility and survivability during surface and air engagements,” one pilot was quoted as saying. “Aft visibility will get the pilot gunned (killed) every time.”

The report also found problems with maintaining the F-35s.

For example, mechanics are supposed to be able to remove the aircraft’s engine and install a new one in two hours, but the mean time was 52 hours — or more than two days.

And will Chinese continue to produce J-10/J-11 in 2025-40? And whom to?

I think the JF-17 will have a rather long lifespan as China’s F-5.

Also J-31 will primarily an export fighter due to the PLA’s rejection of it.

I suspect KFX main market will be Asian and in particular those that don’t like China.

Aside from Indonesia which signed up, the KFX’s marketing outlook is bleak in Asia; there are few countries with enough money to buy it, and those who can afford to prefer to build their own(ie Japan’s F-3, India’s AMCA).

The KFX’s primary market would likely be Middle East and South America.

I think the KFX’s main competitor will be the F-35!

This is why Lockheed is refusing to participate in the KFX program, while the EADS and Boeing pledged to. Hence the winner of the F-X will be one of these two willing vendors.

Upgrading F-15Ks to SE seems unlikely. Maybe the internals would get upgraded to SA standard to ease maintenance might be an option.

The F-15K’s avionics upgrade similar to the F-15S’s upgrade to the F-15SA standard is inevitable due to maintenance issues.

It is generally the electronics components that are hard to source and replicate.

http://www.defenseindustrydaily.com/kf-x-paper-pushing-or-peer-fighter-program-010647/

In the interim, KAI’s FA-50 is emerging as a low-end fighter to replace existing ROKAF F-5s and F-4s, and South Korea is scheduled to have its F-X-3 competition decided before the KF-X resumes. That could leave them with a high-end fleet plan of 80-100 stealth-enhanced F-15SE Strike Eagles, split between new buys and upgrades. It’s fair to ask where an expensive KF-X program would fit in that mix, especially when even on-budget performance of WON 14 billion for development and production could buy and equip over 110 more F-15SEs, instead of 130-150 “F-33s”.

Boeing is close to having its launch customer for the Silent Eagle in a contest where the F-35 purchase is illegal. That would open the way for Saudi purchase of the Silent Eagle.

SAAB will do it by themselves.

Check out FS 2020, its not a Gripen replacement but rather a complement. It will probably be the first western 5th gen air superiority fighter made for “exportability”.

Saab pitched P305(Single engine version) to India, and P306(Twin engine version) to Korea. Both rejected. Saab is still working on KFX program as a consultant, though

The P305/306 cannot happen without a foreign customer.

Boeing’s Super Hornet marketing campaign to Canada has begun.

http://www.cbc.ca/news/canada/story/2013/02/27/pol-fighter-jets-boeing-superhornet-f-35-milewski.html

Boeing touts fighter jet to rival F-35 — at half the price
Super Hornet less stealthy, but has lower sticker price and operational costs

After years of technical problems, it’s a tempting target for Lockheed Martin’s rivals.

It’s no surprise, then, that the No. 2 defence contractor, Boeing, smells blood.

With Ottawa now reviewing its previous commitment to buy the F-35, Boeing is making an aggressive pitch to Canadian taxpayers, offering to save them billions of dollars if they buy Boeing’s Super Hornets instead.

Psst! Wanna save $23B?
And that’s where the difference between the F-35 and the Super Hornet rockets into the stratosphere.

“The current actual costs to operate a Super Hornet are less than half the cost that the F-35 is projected to be once it’s in operation, just to operate,” says Mike Gibbons, vice-president in charge of the Super Hornet program.

Less than half? But how can he know that, since the F-35s are not yet in service?