Like many others, I've been playing the beta over the weekend and I've a few suggestions to make for it.
Set the base hotkey as F1, and maybe add a system to assign your other production buildings to the other F# keys, a handy way to speed things up when selecting production buildings while also keeping your normal number keys free for unit groups.
when you drag a box to select a bunch of your units, don't have it pick up and select any builders that are in the group, a-la dow1 builder and unit selection
personally I feel something should be down about the resource rate. if you loose a fight early game, or loose a squad, your resource rate isn't close to high enough to push back and capture the points you need to allow you to rebuild and make the game a contest again.
the reinforcement cost of squads is also very very high, further slowing down the early game if you manage to avoid losing squads but do lose squad members.
i dont want to comment on balance because tbh, im after getting used to things being powerful and killing stuff easily from other games, but the difference is that its meant to happen in those games and thus the comeback mechanics are there to compensate. this game is very punishing in comparison. going back to the resource rate, i feel that upkeep should be a bigger thing.
maybe your base income is X, and for every unit you have less than your enemy (if you looe a squad, not just by him building a squad first) your base income is raised for a period so you can try and get back into the game. the increase would be more dramatic right after you loose a squad and then taper off so you cant just bank a whole load of resources.
thats imo anyway, it feels like you have to be far too cautious early game for it to be a DOW game as it is.