Granted, I have only done Ultima Weapon 4 times. No other dungeon.

However, Ultima seems to be hitting much, much harder than normal. I came close to a wipe several times. That never happens. One of its moves used to hit for 1/3rd health, now it is hitting for almost 70%.

Maybe I missed the part where it said the dungeons with the tomes attached would get harder.

I am not the only one that noticed. It's kinda putting me off wanting to do the MSQ roulette, something which I normally run several times per day.

Hitting harder is great with an experienced group. But Ultima is a pretty long fight with most of the deaths (from non-mechanic avoiding newbies) happening at the tail end of the fight. Just before the power boost.