Another eraMegaTen question: How do I select skills for a fused demon to inherit? The game tells me I haven't selected any, but the only option I can find is extracting skills as cards. Nothing seems to allow the fused demon to gain skills from the component demons directly.
TheUI for this is a bit of a nightmare. But basically, just type in a number. I have NO idea what numbers match what, because they aren't the ones listed on screen, but what I've been doing and having it work for me is start from the empty slot next to the last skill on the fused result. For instance, if they have 3, typing 4, then hitting enter will put a skill there. Typing 4 again will remove it. Typing 5 will put a different skill in, etc.
Oh, and to address your older questions, P is being worked on, but it's mostly to squash bugs and they're in pretty obscure places, now. All content is there, in fact there's some new stuff. You just might find odd bits in the less well-explored sections of the game, but those are getting very rare now. Can also get P from that same front page.