I love tactician mode and I don't break the game. I even find it easy most of the times.
I do engage on a health amount of pick pocketing, keep most of my bartering gear and waste a little time thinking where to place my chars. Nothing game breaking.
I don't understand this mentality that if you could not stroll trough the game on the hardest difficult, therefore no one can. That's why the lower levels of the game are there for. If you are not having fun playing on tactician, try classical or explorer out and enjoy the game.
