Using relevant Decks:
- WATER: Dinomists might enjoy the added protection, but if I remember correctly, the protection sort of conflicts. Guess the bosses could use it, but iffy on that. Nekroz (if the banlist hasn't defanged them badly) might appreciate not getting popped by common removal and all. Don't know how well Graydles can keep stuff going, but the protection is nice for WATER decks. Yeah, you have to deal with stuff like in the below bullet, but that's about it.
- FIRE: Uh, 5600 ATK double piercing Orihulk much, then blow up something afterwards? But yeah, Igknights (still relevant?), Metalfoes and a few other things (Fire Fists are one of the few things coming to mind in terms of relevant stuff) can go for OTKs if they want to.
- Rest of everything: Good enough for softening stuff up, I guess. Out of the stuff in the above list, I think only 1-2 common FIRE decks are even here that would blow everything up. There is the option of hitting generic ED to do it, yes, but that's somewhat dependent on the opponent having something to trigger it. Or you can just change the Attribute yourself, but sounds like more work just to have the opponent blow up (and possible recur their resources).
So yeah, this is pretty much dependent on FIRE monsters existing to do a lot of things; WATER gets a pretty nice deal here with protection, FIRE can OTK (potentially) and everything else...gets to soften up opposing monsters (the last part makes sense flavor-wise).