I honestly just wish for more general polish, to make the experience more akin to the official mainline Pokemon games:
Improved/overhauled NPC dialogue boxes
Proper UI scaling in general (currently, when selecting 1.25x/1.5x/1.75x scale it just blurs and stretches the original 1x UI instead of proper higher resolution variants)
More SFX in general (the audible "beep" when selecting menu items, the noise when you jump down a ledge, enter buildings, go up/down stairs, etc.)