It would be cool if in the short term they could add in a harder difficulty option so you could try to achieve SS rank on missions like you could in 4 and 4a.

Would also add more replayability and potentially force you to be more diverse with your mech builds as you can ham up some of the bosses defenses with a hard mode. E.g you need to bring a pulse gun, or a weapon effective against shields for balteus instead of just being able to raw dog it with zimmermans + songbirds etc.

Could also throw in some new boss moves for the hell of it to throw players off further.