This thread is about the A7 update - for requesting new features we have the future section. ent_blendframe is indeed harder to use than ent_animate, but the reason is technical. A7 can not interpolate more than two vertex frames. That's why blending between different scenes can normally not be smooth when you interpolate the scenes at the same time.

If you want to smoothly blend between scenes, use bones animation - there you can blend as many frames as you want, and as smooth as you want.