Never underestimate people's ability to misconstrue. If Yoshi P has ever said something out loud in his life, even in the shower, it was a solemn vow to the players and a convenant sealed in blood.

I think that way back when he said those things, yeah he probably did intend to add more pets to SMN. But then as the design proceeded forward, he realized that the job needed more work than just throwing a couple more pets at it. That's why he talked later about reworking SMN on a broader scale and stopped talking about more egis.

It doesn't mean it'll never happen. It means that the reality of the situation here prevented it from happening right now.