I've been playing the game for close to a week now. I have no luck at all at turret placement, and Tactician's flying bots seems pretty underpowered. The medic class is pretty overpowered, imo, especially when you unlock its secondary ability.
Since I've unlocked that badge that give you more points for body count kills, I've been "grinding" my way up to general by just hopping from one "TDM only" game to another as a medic. When I get bored of that (and I do get bored of mindless TDM quickly too, might I add), then I'll try to score some Warzone as either a Engineer or as a Tactician, just to get those out of the way.
Who knows, I might just get the hang of these two annoying abilities, get the unlocks, and form up what I've been told was a "one-man-army" build: Engineer with Tactician secondary.
PS: I do believe that a well played Tactician can really turn the tides, especially with well-placed spawn points. I've personally seen my team win with the cap-the-flag, territory, and defend/assault variants by planting a spawn point very close to the capture point, and quickly degenerating that match to a war of attrition...