We will switch as soon as xonotic gets as mature as nex 2.5.2. I think our servers will keep nexuiz 2.5.2-like settings so gameplay wont change much after we made the switch. With default settings xonotic is way too fast in my taste, especially minsta+hook. Feels more like a crippled warsow clone than playing nexuiz
But thats the very first public version of xonotic and I'm sure we'll manage to find a compromise between keeping the "nexuiz-feeling" and cool new xonotic stuff. I'll set up a xonotic test server soon so we can start working on that.
And welcome to our forums.