The prestige missions hate me

So yesterday, I ran the kat prestige mission. Ran into a randomized black kat in the final arena! Fun right?
Well, no, not exactly. Turns out black kats spawned into the prestige mission final arenas do not drop anything, regardless of if they are randomly spawned in.
In every kat prestige mission you fight 2 black kats in the final arena. One in wave 2, one in wave 3. See, yesterday I fought 2 in wave 3.
Fast forwards to today, where I fight 2 black kats in waves 2 and 3. Guess what? Both these randomized ones dropped nothing.
Unless there's been a change recently, I'm calling shenanigans on these spawns. Been cheated out of 5 black kats so far this event. fml

There are two guaranteed Black Kat spawns at the end of the prestige mission. On top of these, I've gotten 3 black kat spawned by RNG across two prestige missions. The RNG spawned ones dropped nothing as well as the guaranteed ones dropping nothing.
I'm perfectly fine with the guaranteed ones dropping nothing, however the randomly spawned ones in the same fight ought to drop their randomly-spawned loot. That's 3 rolls for a book of dark rituals that I haven't had.
I caught the first time on video and sent it to support via email. They agreed that the randomly spawned one should drop pages and would move it forwards.

It's impressive that Three Rings has agreed to give you the Ancient Pages. I hope that they fix the bug as well. Anyway, good work.

They haven't given me compensation for the glitch, but I don't really expect them to. I'd rather have the glitch fixed so that everyone can get pages than personally get 15 pages for compensation and maybe roll a dice 5 times to see if I should have gotten a book. I'll still encounter more kats but I'd just prefer the ones I encounter that are randomly spawned to, well, work like randomly spawned kats.

It'd be kind of nice if they just let you find stuff from those kats and made the mission replayable. As long as it had statistically fewer kats/pages than other alternatives it'd offer a nice reprieve as well as more stable option.
Personally I'd move the first level to D26, and make that an undead compounds. D27 would be an undead/shock or undead/fire arena with no elevators until the end (so that you'd have to deal with the grievers) and D28 would be like it is now. This way, the event becomes exciting for everyone.. an easy source of radiant fire crystals + more difficult than the normal areas you'd farm as well as a reliable source of fighting the kats.. but would still benefit running the other levels; they'd be easier + faster in terms of just books.

They agreed that the randomly spawned one should drop pages and would move it forwards.
I misinterpreted the "it" in this sentence. Anyway, thanks for finding a bug and getting Three Rings to talk about it.

Why do people think greavers are so bad? Their windup is so long and so easy to interrupt, not to mention they love to all swarm for easy swatting when you back into a corner. Gorgos are the true nightmare with their horrendous hitbox for gunners and swordsman alike, and their ridiculous sideways sliding when winding up for their lunge attack that makes escaping them while bombing almost impossible.

You know how to deal with greavers. Many players do not.
In contrast, all players know how to deal with zombies, because they're so slow. There's not much to figure out. In this way, zombies are easier than greavers.
You are right that many players do not know how to deal with gorgos either.

Greaver swarms are honestly one of the easiest enemy swarms that can spawn in an arena for me. Typically in arenas with greavers I'll have my rocket hammer on hand, and that thing absolutely destroys greavers.
However I need to have active aggro of greavers to make it really easy, which means standing around idly near their spawns until they activate. In a team scenario, people seem to do more harm than good because of this, as they just smack things the moment they see them instead of letting the hammer knight literally destroy them in one fell swoop.
Gorgos are only really difficult when you have AT turned off, but really are annoying to all weapon types except bombs. I have found that AT cutters wreck gorgos, but unless you have high ASI and damage WHB will turn out better because of flinching.
You lose your ability for random token drops in order to get a guaranteed drop at the end. I think that's relatively fair.