I agree with pretty much all the points you lists.

* Climbing is part of these things I gather under the label of "verticality doesn't work (yet)". Currently, many parts of the game still behave like in a 2D game.

* I'm somewhat glad to see I'm not the only struggling with the initiative track, characters out of combat joining the fight, not having a full go, not playing during first round, and overall feeling like I have turns stolen from me. It kind of confirms to me that I'm not completely stupid and that the system is not working properly yet.
Given that they initially unveiled a system where the whole party would play followed by the enemy party, and only changed the system to the individual initiatives a bit before EA (with the nice idea of having consecutive character being freely playable), I think they're still in the early stage of the initiative and combat system. I hope much work goes on this.

* They have publicly stated before EA that they were still thinking about how to implement reactions. The problem is that, much like playing spells out of your turn in Magic : The Gathering, reactions are a thing that might work well in TT, but will be a pain in the flow in a video game. I hope they can greatly streamline the rules around this. I don't want to have prompts asking whether I want to spend my reaction now. I think they could
- say that you can have at most one reaction type active at any given time, or even better (because it contains the first option as a particular case),
- say that you may activate several reaction abilities, but the first time one condition is met for a reaction, your character will spend their reaction doing that and thus won't be able to trigger the others.

* And yes, hopefully they will add variety in the enemy AIs.