I love #1, and by extension #3. I love achievements and am an addict when it comes to collecting them. Achievements can also be a great way to give out one time large rewards.
Titles are fun too and can be an extension of a name instead of a whole new line. (ie: Angler Lailyna).
#2 I'm not too keen on since you said "instead of". I like the random poke holds and removing this ( which is a part of the main games as well) would render moves like covet and theif pretty much useless. Additional ways to get some items I'm fine with, removing wild poke holds I'm not.
#4. I have no opinion on since its known they are working on it and i have no idea what they already have planned for it.
Of course these are in the future ideas, but it never hurts to start thinking ahead.