It's not that the abilities were not defined well. I think the game does a great job letting you know what everything you have actually does, but it did a poor job of explaining how to play the game tactically. Sure, you can play it by just letting the computer do everything for your party, but the first thing I do with that game is turn off the power usage for my AI so that I can use their abilities when I need them.
I'd keep the orginal Mako control scheme because gamers hate change, and there are plenty of people who will say that they love the way the Mako controlled. I think they are crazy people, but again, it's all about having options for me. When I played Deus Ex: Mankind Divided I used the control scheme from Human Revolution. I took one look at the new control setup and knew it wasn't conducive to the way I play those games, and I was glad that I wasn't forced into using it. Same thing with the damage numbers. I love having those, especially in an RPG where I can see exactly how my character is improving based on stats and gear, but I know not everyone likes that. So it's something you can toggle, and would likely be off by default.