That could be neat, and we do already have plans to implement turrets that can walk around, although I'm not certain that the waiting aspect would mend well with the fast-paced aspect of the game, but hey I might be wrong XD
Everything else sounds really good though, and hiding from the walking turrets will certainly be a means to get away from them apart from running, just like you can hide from the Roof Turrets (which is the name of the "shoot camera" you're referring to👍)
Thanks for the feedback and ideas!