A quite simple request as I see it;
I'd like to be able to overgive an entity pointer to ent_blend as well, just like I can to ent_animate.
It just makes it easier to animate an object using an external function without corrupting the my pointer:

ent_blend(ENTIT* ent,anm_percent,blend_percent);

EDIT: Oh, I've just seen, this is already implemented for ent_blendframe... Cool. Solved then.