I only like playing the strategic mode in these games...the tac mode does nothing for me, and so I always run the quick resolutions.
BUT, there is another reason for that.
If the AI is lacking in the tac mode and I run quick res, then the AI is essentially running both sides, with its own limitations equal to both sides, so the outcome will be more equal in regards to the battle itself as far as there will be no big advantage or disadvantage because a human will not be playing..therefore, the battles will play themselves out the way they should according to the battle parameters, so I have to really make sure I have the right mix of troops, leaders, terrain, etc. before I go into battle....I play this way in all these games and really don't think there should be detailed tac modes in them...for me they take away from the flow, not matter how quick they play out, and if the tac AI isn't very good then its almost like a cheat for the human and makes the strategic part of the game less important.
I like this game quite a bit, btw.