I think one action, instead of one turn would be better... Loosing 3 moves just to change forms seems a bit steep.
Also, why don't you think they would be good here? I would LOVE to have my Mawile and Absol change form in to 'OMFG WHAT IS THAT COMING OUT OF YOUR HEAD Mawile' and 'Emo-Absol' to fight 'Kangaskahn + son' and 'Fabio Ampharados' in a ASB battle. I only hope that Farfech'd gets a Mega form so the haters can stop complaining.
Blade, you don't mean that. If you were to leave you would want to make sure that your epic Blazeiken found a new home to continue beating Charles Legend in your honor.
And now, ONWARDS to more shenanigans. We need a mod (DL or Grey or MLG) to come and give us some feedback!