I play a Roman campaign in VH/H....then I read in battles enemy has +4 advantage when playing on hard. So AI does not change but the enemy are just harder to kill THAN NORMAL?

(Because I'm having hard times ....will I be stuck.I just took half of spain and whole italy and south of gaul...now fighting with Epirus(which conquered Makedonia), Carthage and Lusotona at the same time. If the Gauls come too I'll have real tough times.)
ANyway it's much more fun to win battles this way since it makes you feel the victory more...battles lasting longer...but a lot of casualties.

What about the generals without stars but have traits.....are their commands actually exist(and invisible) or they've none? I couldn't really understand the trait system...

Is it going to be hard to control cities when empire expands like in the vanilla version or the cities are easier to control? I hope they're easier because I believe it was a real time wasting trying to increase garrisons in cities faar away.
BTw I've realized that every city has unrest problem even though it doesn't effec them much....but unrest always exist why is that?