That's a shame, but I understand.
I'm a huge fan of DHP, and Niles was my favorite character. My fav episodes were more about him and I loved it in the IQ episode when it turned out that Niles had a significantly higher IQ than the narcissistic Frasier. I might be able to watch the new iteration if they toned the Frasier character back a bit from the narcissistic ways, as I found that repellent.
I get the vibe that it's pretty much ONLY Grammer who will return. He's a very good actor, so no problem with him but it would be a shame to not have any of the other regular characters. I know that Mahoney is gone, Eddie is gone, and Leeves has another show (that I watch), at this point so I guess only the beyond-secondary characters are left and that wouldn't make a good. I have no idea what Peri Gilpin does these days. So, maybe it's a good thing to have all new characters.