Isn't this the point of open source though. They have a vision of making a fast lightweight desktop based on linux and they did it. If people don't like it, they won't use it.
In that case there is no reason for any distro of linux to exist. Just one should be enough. There is a lot of reinventio in the space of linux and that is a good thing IMO.
This is just a beginning. A first attempt at what they want to do. Future iterations might bring out something nicer. Again as I said, if it doesn't market will tell them so.