Originally Posted by Corwin 
The problem with any tactics in DA2 is resource management. If you check out the first wave and plan how to defeat it, you find yourself waiting for cooldowns to finish when the second wave pops in so your tactics become survive till you can use your spells/skills again. I find that frustrating.
It is certainly harmful to tactical planning to have enemies randomly spawn, but that in no way makes it not a tactical game. Also once you realize enemies come in waves every fight you can plan around that, making it somewhat moot.