Ha ha ha. I'm fine, and I don't mind, so long as no one else is concerned or doesn't want the character in the party.
I have always felt that Moon Druid should be playable with someone with 10s across the board (that would be better than my roll, admittedly...). That would impact the amount of healing he can give, though, and so I've accepted the bump to wisdom up to 14, so as not to hose the rest of the party completely in one thing he can do.
I'm fine if people would prefer Amicus not come along - but please speak up, if that's the case. I'm pretty confident he will be able to hold his own, but we'll see.
Like you, I am curious what the "b" is actually giving in output. My suspicion is that 3, 4, 5, and 6 are all being read as "3". I've just tried to see if it's "bottom", though, and "4d6t3" is not recognized.