Ah, so you're the one who is allowed to set the criteria for what we, the players, define as a "removal spell". I'm glad to know.
And your argument fails. Any "hard" removal spell you speak of can be countered if your opponent has mana open and meets some conditions (Vines/Swerve in the case of Path, Dauntless Escort in play in the case of most other removal you speak of).
Look at it this way: you're only ever going to use a Disfigure or a Tendrils to kill a creature, therefore, it's creature removal. Is that so hard?
This looks like it excludes burn, and it does. Burn is burn, and it CAN be used as removal (therefore not ineligible, but better: it is multifunctional, a great thing to have in Magic cards). This doesn't mean that Burn is no Removal, it does mean that it does not have to be.
Cool story bro. Discuss the OP's intended topic, or make a new thread?
I say white has the best effects, since Exile >> Destroy