I don't think it would be fun to ride a warp star...
I'd rather see him on feet, IMO.
That's just a sprite, based on the game "Kirby's Air Ride", where he actually rides the warp star
And even if Blade planned to make a Kirby into a SRB2 character WAD, he wouldn't have the warp star, isn't that obvious?
The reason everyone prefers Blade's sprite is because it was very well done compared to the other sprites
I don't think riding a warp star would be boring, though