Leave Monster Fusions to Dragon Quest Monsters - They have been doing monster fusions for years now. Never played those games, but Pokemon is not a place for monster fusions.
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I'm glad they are adding 50+ monsters, less than normal. I think 700 is enough. What Pokemon has always lacked was Plot. The anime, movies, games, never have High Quality plots. BW had THEME, but not really a story or plot.
What if, instead of focusing on adding new monster, They instead work on adding interesting Character, Dialogue, Scenario, and Story-lines into the Pokemon Games?
Paper Mario is humor-based, sure, but it has AMAZING scripts - mostly due to funny dialogue. Super Paper MArio even had a few heart-wrenching Characters.
Imagine playing a Shin Megami Tensai Game, but with Pokemon instead.