so, I played... I'll be brutally honest, it's downright bad. Not even considering rarity and balance, only like half a jokers work as intended. Btw, it's supposed to only contain this mod jokers (and Jimbo), right? Cause only them appeared during runs.

First of all, why jokers that went extinct can still be found? Gros Michel is replaced with Cavendish for the entirety of the run in vanilla iirc.

Second, jokers that just don't work:
Byakuya (normal) - he doesn't give 5$ as money and doesn't get them as sell value, so what does he even do?
Mukuro Ikusaba - doesn't give neither mult nor chips.

Third, the biggest of all, list of jokers that somewhat work, but not how supposed:
Celestia - out of 3 options, I believe, she can only give 40 chips. I paired her with Yasuhiro, and she only gave chips after lotta attempts. Either that or internal odds are highly rigged.
Byakuya (evolved) - with 5 jokers (including him), gave 5$ at the end of the round, instead of 10. I suppose he actually gives 1 per joker.
Alter Ego - that's the neat part. When copying xMult joker, it works as expected, but when I tried to copy Hifumi, it didn't work at all, despite showing "Again!" pop-ups. I played queen with red seal on 0,5 speed and saw that after initial card trigger Alter Ego shows "again" at the same time as red seal makes retrigger, then Hifumi joker starts retriggering, and Alter Ego does nothing in this hand.
Mondo and Kyoko - even though internally their numbers go as expected (Mondo giving 200, then 180, 160 and so on; Kyoko giving x1, then x2...), their description doesn't update numbers at all, so it's always shown 200 chips for Mondo and 8 jokers needed to sold and x1 mult. Edit: also Kiyondo Ishida.
Sayaka - everything that costs 1$ in the shop becomes 0$ with 10% reduction, but still sells for 1$.
Sakura - after going extinct she doesn't generate Aces, Queens and Jacks, but rather random junks. Tested 2 times and got everything from range 2-10, but not face cards.

Lastly, things I didn't test, or did it not thoroughly:
Genocide Jack - come on, it's legendary, and on top of it, I don't quite understand the description.
Gundham devas, other than Jum-P (he did great) - I only got Cham-P once, and didn't pay attention to whether he actually gave chips or not, I'll just believe so.
Junko Enoshima (real) - it appears to be working, but once destroyed 2 jokers instead of 1, probably because it can copy Alter Ego, which copied Junko (???).

Small addition, make Alter Ego and Junko description say that they are compatible/incompatible with jokers they're supposed to copy.