I wouldn't mind a certain amount of turning being added to the T3 alpha's 3-bite combo, with a limited turning radius. The problem I had with it before was that it was completely unpredictable: sometimes they'd turn, sometimes they wouldn't.

I think the retrode beam nerfs were to prevent you from getting nailed from offscreen. It was very easy before to get hit with a retrode beam from one that you couldn't even see. Much like wolvers teleporting mid-attack, it makes it an unavoidable attack.

For the post-spawn delay, I wouldn't mind seeing it restricted to attacks only. IE, for one second after spawning the monsters can't attack, but can still walk around and chase you. It looks a bit unnatural for them to just be standing there.

Retrodes and Zombies were relatively unique in their ability to turn while charging an attack, and I think pretty much everyone agreed that their arms were a bit longer than they looked. That particular combination made it almost impossible to dodge an attack if you happened to walk past one too close, which was especially troublesome for bombers. As with the alphas, I think a limited turn rate while charging the attack wouldn't be out of place for T3.