I would like to have a button to save our interface and titles for subclasses. Because every time i swap to tank class, some of my classes get their interface deleted or replaced with wrong interface. For an expamle if i swap to knight/druid and then when i swap back to mage/druid, my skill bars get deleted or replace with another class' skill bars. My titles also are not saved when i swap my classes. It would be great if you add a button to save all subclasses.
I am not quite sure I got what you meant. You can use [vActionBar Fix] from the list of addons in the client. It can save different skill bar setups for each combo or even named saves (for example 1 for PvE and another for PvP). However, sometimes the item set skills don't get saved/loaded due to a bug (I am not sure where), especially the crafting ones.
When i use [vActionBar Fix] addon, it tries to delete my ring every time i swap my class, and like you said before sometimes it doesnt save iss skills. Some addons are always causing problems. I wish we could save our interface and titles for every class without an addon