I can't speak for others, but 10MB is noise to me on my DVD. Once my install moved from CD to DVD (long ago), an extra 10MB here and there stopped mattering.
I always install vcredist, so I guess I have minor concerns that if it is included, it will cause a conflict with the pack I use. (Conflicts seem to creep in to my installs easily, as is evident in my experience in this thread.)
BTW, CCC starts the first time for me now, so I'm not experiencing the problem you have. However, my finisher doesn't seem to do anything else after it installs CCC, which then leaves all the junk in my C drive (and doesn't seem to do the KTD I have for my cell phone drivers). I'm currently trying to debug that to see if it is some other conflict. When I look in the finisher log, it says it has 2 tasks, then does the CCC install, and that is the last line in the finisher log.