This game's track record is anything but predictable though no? SCOB was a substantial step up in difficulty and mechanics vs BCOB, FCOB was more of a halfway house and I'm fairly certain I remember SE stating that they were happy with the difficulty they hit with Bahamut Prime. Gordias was massively removed from anything we had seen before, A3S was significantly harder than any main line coil turn (And was one of the best bosses of this expansion) whilst one can only guess at how low the clear rate would have been for A4S if Pentacle had have forced a wipe when failed.
Back onto the topic with the thread: At the end of the day, WHM is simply not meta, nothing more, nothing less. PLD in A12S is a better example of a class that is an outright hinderance (You typically run out of cooldowns by inceptions, not really an issue at 270 with echo, but at 230 without, it was problematic to say the least). Whilst a WHM might not bring a bottle to the party like AST does, it certainly isn't stopping the show either.
It's good that we have these discussions here to keep SE aware that we don't think the job is in a good place right now. But I can't help but feel that all the cries of 'RIP WHM' and so forth do very little for this communities credibility on these matters when the job is actively getting played and doing just fine at every level of the game despite what this forum would have you believe.