Yes, there are not nearly as many.
I have 10 strictly dm maps right now, and then several that I converted over by adding new spawn points. Some are lousy. So I am not using them.
I tried to pick ones that were not linear, had lots of space and hiding places etc.
Rome makes a great dm map so far.
I am converting Dark Ages over now, and I think it will be good as well. Right now there are a lot of underused spots in Dark Ages since most people zoom by them to get to the flag.
I am considering propaint2 and sandassault.