Despite any issue you might have with Yoshi-P, it's almost always better to maintain the current dev team(s) than to replace them. For better or for worse. When you start shifting devs in and out that's how you end up with World of Warcraft and the position it is in today. It worked out with 1.0 vs 2.0 sure, but that was a special case that isn't being replicated at the moment.