It sees like a challenge between your new found strength, and the old patterns of your life that are still there, but dormant. You've definately come a long way and you sound like a great person, but you might not be strong enough to take a stand in front of your mum like you'd need to. She probably just wants the best for you, but her views are clouded by her own values and judgements.
If I was in your position, I wouldn't move back home. I'd find somewhere to live cheaply, and work on improving the relationship at a distance. The main reason why you don't want to live back home is not because your mum would have more influence, but because she'd have more power. If she gets scared when she could be losing, she might get defensive and try and use her formal mother authority to force a ruling, and that would permanently and negatively affect the relationship.
In this case your doubts are probably justified. Good luck to you either way.
