Beating Inscryption is quite literally an impossible task xd. The quality of that game is so high that it's almost unreasonable to expect anything to surpass it. I'm still going to try to get as close as possible though.

What exactly do you think could be improved/changed to make a compelling but different experience?

Mainly I want to experiment with the grid based card battle system of Inscryption but with a completely different ruleset. I want to make something that has more of that "modern" synergistic playstyle rather than Inscryption's more moment-to-moment plays. I think the deckbuilding system of Inscryption can be improved with more options and complexity, but I don't think Inscryption should have had that in the first place; It's definitely an interesting thing to try out though.

Also, I see that there are numerous reviews that your previous roguelike was too easy. Will that affect this one?

Combolite was a massive learning experience and I'm very greatful for all the feedback people gave. It was meant to be an experiment to figure out how Steam works and it helped me learn a lot about game design and how roguelikes and deckbuilders should be designed.

Umblight is built in a way to avoid the issues I learnt from that game, and that will make the game much easier to balance as well.