So the hack speed seems to have gotten a nice increase. Hooray there. Maybe a smidge faster but it’s good. The rollback speed doesn’t seem to have changed at all. It’s still just as fast to roll back the hack. Probably need to cut that speed in half.
On top of that you should let the ops rollback the hack instead of the engies. See you get a bunch of engies to setup defense AND are able to roll back the hack. If you had to have some of the useless class it would help balance that out more.

