Maps

After finding Inkarnate a bit frustrating I would like to see a create your own map option here.

Maps including buildings hills water land ships ports compus ref etc.

This will be a add on to spells character build etc which you already have.

Whitedungeonmaster

If you're frustrated with Inkarnate, I'd maybe recommend Wonderdraft. It's a very intuitive map making program that produces excellent results

Map making tools would be cool, but I'm not sure it's necessary. It is definitely too early to talk about map tools before they have a VTT.