This is very much a net positive, as tokens with evasion are able to end games through combat much more easily than those without, and best of all, Thalisse doesnt care what type of tokens you created earlier in the turn
The buff stays behind and it's also a cheap noncreature spell for Black/Red and and an Equipment for Red/White
It is kinda hard to evaluate whether you just buy all four decks or, for example, buy two decks and then a few singles, just by looking at decklists, so I compiled all the decklist information and broke it out into pieces to help make my decisions easier
decks which, in their prime, were almost unstoppable - and changed the TCG forever
I rarely see it played outside of "toughness typal" decks, but I'd recommend giving it a shot
Final Fantasys Ancient Adamantoise is a great example of this, so long as you have another token generator in play to make two of them