All AST cards already do the same thing, and having them apply to all party members has seriously been suggested by other people since targeting them is too hard for players using a controller. As far as MP is concerned, no it is not an actual resource that needs to be managed anymore, as long as you hit your Lucid Dreaming you will not run out of MP. You also haven't been able to control the Fairy or any pet for a long time now, commands like place and follow are not real pet control.