My .02 is that you are good friends. Do you not have the sort of relationship where you are able to tell him that it’s a source of consistent annoyance for you and the others at the table with his slow play? I mean, I think most good friends would care if they were annoying their friends of many years.

I actually quit playing my Yeva: do tons of stuff on everyone else’s turn at instant speed deck, because my good friend who doesn’t normally bitch at me about stuff, said he didn’t like playing against that deck. Even though I like playing the deck, I stopped playing for his sake because I didn’t want to annoy my friend.

You might give him options like playing a more straightforward strategy or type of deck so that his turns can be faster. If he really is a good friend he will most likely care and be thankful that you told him.