Thank you
@RMerlin! I've been on shibby/tomato for the last 5+ years, and finally made the plunge to this firmware. Waited until this specific release since it addresses KRACK.
Primary reason is that I'm switching over my router duties to my Ubiquiti EdgeRouter X soon, so my RT-N66U will be basically AP only. I also added a second AP, and needed Roaming Assistant for better handoff, which isn't a feature in Tomato. Took me literally less than 15 minutes to flash this firmware over Shibby, and reconfigure my port forwards and DDNS.
FWIW, Roaming Assistant isn't a silver bullet from what I've read. Its really just a suggestion for the clients, and does not hard disconnect when over the RSSI threshold. That said, having it is better than nothing. Though, I do wish I could set it higher than -70.