I have been using Kea on pfSense CE for a long time — I think it was version 23.0.x. Or you mean 3.0 in particular? I also have OPNsense and I am not completely convinced of their aggressive update strategy yet. For a firewall, I prefer stability over features. Jumping to the newest releases every month can have tradeoffs.
Note: in general, both OPNsense and pfSense are excellent. I have never had any problems with either one.