Meh, I was never married to the number of actions, just that there was an action point mechanic. Sounds like most of the same gripes the Excelsior weathered when they reduced the standard amount of actions in Chronopia, and I think it turned out fairly well.
When I was still actively playing Warzone there was certainly a lot of people who weren't sure if three actions were ideal. And even a few who weren't 100% on board with being able to double/triple-tap shooting actions and the like. In a lot of cases the aim action was never taken because taking two shots was almost always better. Now that you can't just continually blaze away the aim action becomes important again.
It still allows flexibility like shoot-move, move-shoot, shoot-hide, aim-shoot, etc.
And of course, it is still model-by-model activation (the real important part of Warzone was that a squad could multi-task).
Three actions and free-form expenditure just never seemed like a sacred cow of the game to me any more than four-action heroes were from 1st Edition. To me, model-by-model and free order in which actions are taken is far more important.
Either way, we can hopefully avoid using terms like "dumbed-down" as they are more inflammatory than they need to be. You don't like the change, that doesn't mean it is any dumber, that means you don't like it. Which is cool by me. But I like the new direction of the action system. It keeps the important tactical-timing factor in squad activation without any of the actions feeling useless or extraneous (like aim tended to be in the face of double and triple fire).
That said, I'm wondering if this is version has had more cut out of it to facilitate testing. Direct question to Prodos, will their be a return of the Warzone reaction mechanics? That is a more important factor for me than almost anything. Warzone's reaction mechanics were always an integral part to me, but I can see why a beta-test would leave them out in the early stages, since they created a lot of complex interactions. But I definitely hope they stick around in some form.