There was a recent thread here just a few weeks ago from someone trying to trouble shoot a tripping breaker. After much disassembly and trouble shooting, he finally traced it to a nicked wire where he cut the AC like you are proposing, without the rotozip. I have heard of inspectors checking how it is cut and failing for not doing it with a rotozip. Whether he'll check yours or not is a **** shoot. You're likely to be fine, but for the small cost, much easier stripping and peace of mind, I'd definitely get the right tool for the job.
As far as rough-in inspection goes, they usually just want to see the ground wires completely connected. No devices installed. Sometimes for a small job you can have devices installed, but hanging out of the boxes and they won't mind that.
Edit: Sounds like you didn't use the rotozip, hopefully that all works out for you.