Somewhere in the middle
Back way when, Wizards didn't really make sure that there were ENOUGH playable limited cards in the common slots for sets (no one was playing much limited before the inception of the Pro Tour, around the release of Ice Age ), so horribly unplayable cards like Snowfall and Balduvian Shaman glutted the common slots of packs - and commons are where most of the meat of your limited cardpool comes from
Thurid, Mare of Destiny Thurid, Mare of Destiny might look like any other lord of horses at first, but free clones of unicorns and pegasi are a huge value
Early on, people were discussing if Tuvasa would be the general to finally unite Simic and Azorius merfolk
This is possibly why its been given its own Disney Lorcana card in Into the Inklands and a very good one at that
Akawalli, the Seething Tower In terms of synergies, Akawalli, the Seething Tower may not offer much for fungi decks, but you can descend towards this being a 7/7 creature in the right graveyard-matters deck