First man in. There's an immediate credit in that
At the moment we have a situation where if you activate you choose an option and act. If you fail you go On Guard, unless you've taken 50% casualties in which case you Withdraw.
In the proposed system you either get two actions which can give you a range of tactical options, or one, where you are restricted to Move, Fire or continue in close combat.
I can't see how that is more complicated?
Aimed Fire - I agree, which is why it costs two actions, so is only available if you fully activate. This is much more likely to happen for more experienced units. Also given the fluid nature of the FUBAR battlespace a Commander has to be pretty certain of his situation to allow a unit to spend two actions to get that +1 bonus.