So I'm alittle lost on how to best take advantage of this command tree choice. Flares are a nice little tool, but the only reason I ever take this tree is to troll with the sniper ace. The partisans aren't as effective to me without their traps, and the armored call in is kinda like a heavy duty StuH, which is alright but by the time you get it is usually gonna get shot up by Pz4's and paks.
Any tips/tricks for me guys?
The thing about Urban is that it's a very use / situation - specific doctrine. You're not going to get a strong "jack-of-all-trades" unit like the Tiger I or a good all-around ability like the IL-2 strike. What you'll get, however, are units that are very strong, but only in their specific roles.
For example, the Sniper Ace is exactly what he's for: killing infantry. Call him in only if there's some heavy infantry spam going on by your opponent. If you do call him in, make to concentrate on buying more tanks or AT then, because you're expected to have the anti-infantry department already covered if you have this unit.
The KV-2 is very good against bunkers and infantry. Obviously if your opponent doesn't have much of either, don't get this unit. If your opponent does have a lot of infantry and bunkers, chances are he will have only around 1-2 "soft-counter" AT units. With micro, your KV-2 will manage. If he has a lot of infantry and bunkers that you need to counter and also a lot of AT guns or tanks to counter your KV-2, then you'd better use other units such as the Artillery Firebase or other tanks to support your KV-2 or else you're obviously fucked anyways.
The main point is that Urban Doctrine offers units that specialize in what they do. Think of them like strong supplements to your army instead of major power boosters like the King Tiger.