I don't think so. It's possible but I haven't noticed much longer loading times with mine. Longer download the first time, but that's about all I've noticed.
Converted WMO's: http://www.sc2mapster.com/assets/more-converted-wmos-wow-building/
Adding team colors and Attachment points to WoW models: http://www.sc2mapster.com/forums/resources/tutorials/31795-tutorial-wow-models-into-sc2-with-team-colors/
Vicboy AuthorWell, does it?
Triggers not working properly? Get a check up from Dr. Debug!