Been playing with a group of people and we all have similar sentiments on POE2 as of the first week.
1. When selecting support gems the tooltip showing you what abilities it works with should be visible during not just after. What support skills work with what, is not as intuitive or open as it was in POE1.
2. Skills & Gems are far to restrictive in this game. This is like going from Diablo2/Grim Dawn and moving to D4 or like van helsing levels of watered down and restrictive. Even worse if you came from POE1 where it felt limitless with experimentation. Support gems feel almost useless at times until you get to S2.
3. You should absolutely be able to change your ascended class. You wont be able to tell how it meshes with your build when unlocking it as you don't have many points to put in and requiring people to start all the way over and playing 15-30 hours just to change it is astonishing.

Small notes:
1. Bottle stash tabs are kinda pointless since the function of combining/upgrading flasks doesn't seem to exist as of yet (at least we couldn't find it.)
2. Make the trials the first time you can go there more prominent on the map. Half the ppl I play with didn't do it till much later because they couldn't see the grey diamond and there was no ! to point it out.
3. Identification scrolls have very little purpose since hooded figure can just do it all and you can town portal without scrolls anytime.

Idea: Add a tab on the passive skill tree that shows percentages and numbers for everything giving existing and new players a better way to plan.

Other then that the game is good. Currency gains are lacklustre compared to the first game but it isn't a big enough deal to worry about. The game is good. Battles are much more engaging as it is more of a action rpg than ever. Much more of watching enemy tells through movements or sound and quicker than what you might be used to when it comes to reacting when doing boss battles and less (Click where red isnt or where telegraphed attack isnt) like in older isometric rpgs. The visuals are great and yeah everything else is fine. Rethink Skill gems and allow changing of Asc Class.