KahlessNestor
Adventurer
The one thing I might recommend to the DM is that, if this player is consistently avoiding combat, and not even doing things like attempting Medicine checks to stabilize fallen party members, then the DM should experiment with not counting that player against the size of the party when adjusting encounter difficulty. The downside to that option is that the party will receive less combat XP as part of their adventures because of it, but since AL has no guarantee that a party will ever receive more XP in an adventure than the minimum allowed, that's just the breaks.
But isn't that ALSO a house rule and not allowed in AL? If he's sitting at the table with a character, he has to be counted, right?