The point behind a link disconnect is preventing getting fucked over because someone linked at the start of the game. Maybe I'll make it based on some time period after you spawn, in a one-life mode at least.
Stuff like holding triangle to go up obstacles, I think would be really useful, since it's annoying having to time the climbing correctly in MGO2 at times.
Wall flattening like MGO1/3 would be more of a preference. I'd like to leave some preferences like that open to people, if I can.
But yeah, your ideas are good as well, I remember reading them before.
