Well, seeing as we have so many spells etc that would be in the unit action bar, that is probably a good improvement.
It does look like it will require Vehem change FF to no longer have the AC displayed where it was pre-BtS.
One thing that slightly concerns me is that with the unit picture gone Promotion Icons would be able to hide the unit's strength/movement/xp/level much more easily.
I like how the unit details were moved over so that they don't overlap with the mana bar.
Any chance I could get you to go ahead and include all 21 mana types in the mana bar? I'll probably add them all in my version, and I don't really feel comfortable editing the main display yet. Also, I'd rather the mana/sphere icons not all look the same as existing ones.
One thing that always annoyed me and which I'm hoping you can change is that in an Advanced Start game you don't know which Leader you are playing, only which civ. You can try giving yourself units that would get free promotions based on a leader's traits, but that doesn't always help, especially if you allow unrestricted leaders. I think knowing what leader you are is a very important piece of strategic information, so it should really be revealed before you start purchasing stuff in advanced start.