I planned on making an Eidolon that's a weapon wielding, armor-wearing biped. However, since he's a weapon-wielder (and a two weapon fighter, at that), the free claws are somewhat wasted.
I can see some of the free evolutions being a problem with a lot of Eidolon visions - not everyone's going to want their biped to have claws, or their quadruped to have a mouth fit for bite attacks, or their serpent to be able to climb.
Therefore, I propose that the following evolutions have the option to be exchanged for something else:
Quadruped: Exchange Bite for Claws
Biped: Exchange Claws for Simple Weapons
Serpentine: Exchange Climb for Swim
What do you all think?