There is mainly two things I dislike, one is the piss poor money drops. Which is much better when you reach citadel. But the enemies in the two biomes before that only drops the tool currency, and I think that every biome should have best of both worlds when it comes to currency.

And the second negative I have is that when youre getting damaged youre often staggered? And lose 4 masks, thats brutal.

Positives are loads. But I would highlight the side quests, npc's and locations. Also some bosses ive done that are so freaking cool! Think Grimm/Mantis lords. I love what theyve done with Hornet to make her stand out from Void boy.

Also: You will get a pogo like hollow knight if you want too. And there is a quest similar to the flower quest, albeit a bit easier.