It'd be pretty great if the community as a whole moved to Cata or MoP. WotLK is getting long on the tooth and the Cata/MoP clients have some pretty useful features that are absent from older versions.
The problems of the community is not the software.I realy have problems with the people.Promisses over and over but noone finish hiw work.
And that's not even getting into the barrier to entry issue. WoW modding is a pain in the ass to get into which ends up scaring away lots of people who could've been prolific modders. You can't expect the scene to prosper when you spend more time trying to coerce crappy tools into working than you do actually creating something.
The software should be improved otherwise the community is going to die. Moreover, we got some guys here who have some skills in programming as far as I know. It would be much more productive if they came together on the development.
If there is a point of this post except for me being drunk: Better tools won't happen. Likely not even tools or emulators for 6.* ever will. This forum has been copying files from WoD to WotLK the last months. It won't get any better.