By all means keep the Il-76s hauling stuff, they are good at that but the Il-96 should be better in other roles the Il-76s are currently used for like Tankers and AWACS.

Sorry, not very clear here. What I mean is that the Il-76 is designed for heavy payloads and operating from rough airstrips so has a higher power to weight ratio than is needed. The Il-96 on the other hand is designed for long range cruise flight with a heavy payload. This means it is better able to perform the AWACS and tanker roles. The Il-76 was chosen because it was available and the removable nature of the refuelling system showed that it was intended they would still be used for their intended original role of hauling freight and equipment.