I personally think the IDE is fine for what this language does. It's mainly about the capabilities of the language that make it easier or harder to use. Would you rather have that flashy, new button on the IDE, or the ability to drop images into the pipeline BETWEEN refreshes? Would you rather have that sweet include manager, or better keyboard/mouse/controller/joystick support?
My personal wish list includes:
Stronger UDT support
Better function for bit level control
Better multi-assignment(it exists, but it's weak) e.g. a=b=4 where a=4 and b=4
Gyotdang += and -= operators, and ++/--(Which would give rise to the need for the == operator... I know, right?)
I feel like, personally for me, with those things and QB64's ability to pull in DLLs, this language could be a lot stronger but keep it's BASIC syntax.