Taiwan's Tuo Jiang Class Corvette

So this ship can operate a MD-500MD/ASW helicopter from the aft position. Can the ship refuel the helicopter or is it just a landing pad? Does the ROCN have any plans to replace the ageing MD-500 fleet with a new naval helicopter or a drone like the MQ-8B?

MD-500 Defender
Length: 23 ft 0 in (7.01 m)
Rotor diameter: 26 ft 4 in (8.03 m)
Height: 8 ft 6 in (2.59 m)
Disc area: 544.63 ft² (50.60 m²)

Armament
four TOW anti-tank missiles, or two 7.62mm General Electric M134 Miniguns plus ammuntion, or four General Dynamics Stinger air-to-air missile, or
Mk 44 or Mk 46 lightweight torpedoes (ASW Version), or two seven-shot rocket pods

Sea Hawk
Length: 64 ft 8 in (19.75 m)
Rotor diameter: 53 ft 8 in (16.35 m)
Height: 17 ft 2 in (5.2 m)
Disc area: 2,262 ft² (210 m²)

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Source: http://slide.mil.news.sina.com.cn/h/slide_8_213_31902.html/d/1#p=1

It seems like there is a lot of wasted space at the aft of this ship. Why didn’t they make the ship a little longer and use that space for a landing pad? Does anyone know if there are plans to use this space in the future for a SAM system, a towed array sonar system, drones, or anything??

ROC Navy aviation:
Sikorsky S-70C(M)-1/2 Thunderhawk (SH-60 Seahawk) United States SAR ASW Naval utility helicopter 19 Out of 10+11 ordered
Hughes 500MD/ASW Defender United States ASW Naval utility helicopter 9 Out of original 13 ordered

In any case, the rear deck can serve Vertrep. “Obviously”, if working with a helicopter on deck, it is to work with Defende rather than Sea Hawk. Although I can’t see what the Defender would add (or Sea Hawk, for that matter)