Binders make a great alternative: although they hold fewer cards, they fit nicely onto shelves or cupboards and most options contain transparent pages with pockets into which to tuck your cards
Gengar V is great, but on its own it will struggle to keep up with Pokmon VMAX that are out of reach of its attacks
Blue has plenty of great proliferate cards to push the poison along
However, the main downside of Paleozoic is how many powerful shut-out cards there are to counter it with
Gapejaw Bog is most commonly used to help put damage on its own players Pokmon to make attacks reliant on damage counters being on that players Pokmon more potent, but its 2 damage counters may still make the difference between a 1- and 2-hit knockout against your opponents Pokmon
Its a nice tweak on the morbid mechanic from Innistrad past, it emphasises the graveyard without making every color care about recursion, and having a bunch of new reasons to care about exiling graveyards will be important for combatting UB Rogues in Standard after the escape cards from Theros Beyond Death rotate