Mecha has been struggling for almost a decade now. If it hasn't got the Gundam name on it then it doesn't have much of an audience. We were seeing 1, maybe 2 shows a season having mecha in them but even that is drying up or being sidelined. This season we have a series who's plot hook is mecha but the actual series is just a fag romance with the mecha pushed as far into the background as 5 seconds of bad CGI an episode can get.
FAG and Mazinger girls looks to be the final nail in the coffin for the genre from what I can tell. These series sell to the harem market and can have mass produced figures with head swaps and armor swaps to recycle the same design near infinitely. The last few seasons mecha series look to have been replaced by these, which is replacing the Build fighters/Danball senki market which was all that mecha had left.
Where does mecha go from here as a genre? Is it just a slump or did the increased cost of designing robots over just a harem cast kill it?