My wish list:
Make it more scope friendly, maybe a 60 degree bolt lift, and either drilled and tapped for a commonly available weaver mount or a built in weaver mount. No more 11mm or 3/8" BS.
Nicer trigger guard. The 452/453 one works but looks cheap. If they can make a trigger as nice as tuned one, count me in.
Having all actions use 2 screws is a good thing. It will permit stock builders to build a stock and know it will fit. That should get the aftermarket involved more.
Make some available in stainless.
A barrel change system like Savage would make sense from a manufacturing standpoint and permit us to switch calibers easily.
Use the same magazines as the current 452/453. Maybe some stainless magazines?
My dream gun ( currently ) is something like a stainless sweet 16 with a synthetic stock and iron sights.