Installed the 1.10 today using the standard procedure. Major issues with wifi disconnects. My Roku 4, which has been 100% rock solid with this router on all other firmware, can't hold a connection at all. My Chromecast Audio also bugged out on the hi-fi. This was all the case with SC enabled (and which was never an issue before).
Reverting back to previous 1.09 solved it all. Like others said, it is a shame since the new features looked and sounded great.