Hmm... Taka might be the one to rebel considering Team Meteor wasn't 'bad' until Lin came along and Solaris was the leader before so might blame his dad for not restoring things to how they were.
Ame is always gonna make the game harder. After all, we are late in the game so the gym leaders will start to have pokemon with competitive EVs and Ivs and eventually moves.
I think we may see her in Ametrine Town (or whatever it's called) and I don't know if Cal will be there but I know if she's in the area and he is then a battle will probably determine if she wants to talk to him or not...