...I'm beginning to agree with you. Or at least I will if all these crazy Yoda movie rumours prove true.
Yoda was a great part of TESB. He was a necessary if negligible part of ROTJ. Then the prequels came and he turned into an annoying parody of himself. The world does not need more of this.
Dear Disney, if you're looking for a Star Wars character who really could support stand-alone movies, try this one.