One of the things I like about singleton formats is that the raw power level of cards can be higher since you can't have multiples and are less likely to see the card in any given game. Incidentally that also helps the price of the format as well.
I can sympathize with not wanting another Commander variant, the format is so popular it feels like it's everywhere. That being said, having the commander always available to cast is part of what enables the rich deck-building opportunities, since it establishes a base level of consistency that a singleton deck would otherwise lack. We're partially mitigating that here with the lower deck size, but it's still something to be mindful of - you don't want the format to be immediately solved into a small group of decks that beat the rest of the field simply by way of being that much more consistent than the others.