I think that's unlikely as if anything goes wrong, there's literally no way to restore the software on the Watch. I'm reading the developer documentation and it even warns that if anything goes wrong installing the beta, it will have to be sent to an Apple repair centre.
Thats good to know, I am now getting notifications on both watch and phone but only for imessage it seems...I am debating going back to 9.3 b3 but dont know if I want to spend the time doing it, may just deal with the bug hoping it gets fixed soon...