Red decks need their removal to be able to go directly to the face, which is the one thing you cannot Terminate, and while being cheap is nice, the creatures you need Terminate for don't come out fast enough to reward you much for it being so cheap
Looking at the card itself, it has a lot going for it
Deeproot Elite's effect is fairly elegant and clean: when a Merfolk enters, you get to put a +1/+1 counter on another Merfolk you control
2022 Pokmon TCG World Championships Deck Includes
Kaya, Spirits Justice Kaya, Spirits' Justice can drop, exile your Cityscape Leveler from your graveyard (while also surveilling 2) and turn a Clue or Food token, not just a thopter or spirit into a copy of it that flies
Then theres desirability among the casual playing group is it unique, splashy and fun