why not develop a new project ,i think that's better for new community .
The project is new. If you mean, why was the coin born from a swap, I really don't see any issue with this. I wasn't lucky enough to own any KTK prior to PHORE, so I had to get my coins through peer-to-peer or on Coinsmarkets. I'm very glad I did.
The dev works very fast and being in the Slack for a bit, I could tell this was going to be a successful project. After a bit, you just get the nose for these sort of things.
This also allows people who had KTK another option to swap to a new coin. Frankly, I think this was a good move, as the people who had KTK can now be confident that an experienced dev is working on PHORE.
Of course, they do not have to swap . . but I really don't see why they wouldn't.