I think it's great that you're doing power cleans and snatches and want to do the full version. As I'm sure you're aware, by doing the full version you'll be able to use more weight...once you get over your weakness of getting out of the hole. Getting out of the hole is my specialty! Some things that may help you get out of the hole faster and stronger:
Practice the full movements with weight that your confident with. Move up as you feel comfortable.
Front squat and OH squat at least once a week. Go deep damnit! If you can't, then get flexible.
Snatch grip deadlifts.
Deadlift variations off of a box.
Snatch grip deads and dead variations off of a box force you to get low. These lifts will give you good power out of the hole.
Make sure that you are using good supliment exercises too, such as Glute ham raises (the best supliments IMO), SLDL's, hypers, and one of the best exercises for getting out of the hole....pistols and weighted pistols. You HAVE to go ass to grass in these, then explode up.
Practice these things, get creative, be safe and you'll improve full clean and snatch lifts!!!!!
I think some of the problems people have had switching from power to full or not just switching but including the full lifts are coordination. It's a new movement, front and overhead squats help. Try them from the hang also, I find it easier and it may be an easy way to transition to the full lift.