Get on the best team he can. My son had fun in LL too but only about 3 boys stayed w baseball, most chose football or basketball.
If son has passion for game, time to move on. Not many kids get opportunity your son may have. They may find someone else to take his spot on travel team and not want/need him next yr. I would not try and do both ESP for a P.
My son never had problem making new friends when he played for new team. Kids have a lot to talk about and traveling makes them closer. Just my two cents