It sounds like some people are having minor stability issues. As this is my first custom ROM, would it be smart for me to stick with Rev2.1 for a little while?
Not necessarily. As with all roms/kernels sometimes a particular device will act differently than another "identical" device. Especially with kernels.
You are hearing from the few that are having issues but not from the majority that are not. There were peeps having issues with all other versions as well and can be caused by numerous things.
Try it and see how it runs for you. Easy enough to flash something different later on if you prefer. At this point I find this build to be just as good or better than the previous.