Using the SP VS mod, I play a lot of my games against an all bot survivor team and its hell when you're the only SI attacking them. They are also incredibly good shots too. I cant tell you how many times Ellis iced me as a hunter just jumping from building to building to get to a spot. In some ways I believe its harder to play against all survivor bots.

However, as mentioned they have a hard time triggering some crescendos which locks you in to "waiting for finale" if you die as they reach a crescendo area. I have to end up switching teams, trigger it and swap back to infected but because of one of many updates, I'll end up playing against >>5<< survivors. That isn't fun.

Anyway, you can use this plugin/mod to setup a game swap to infected, and watch them by following them around while in spawn mode.