My meterless BnB is 5AA->5B->5C(2hits)->2AB->214A which leads into his oki games, command grab or short hop or jump crossover.
I feel his moves fits the whole trickster motif of Adachi, like have you tried 2B->5C or 2D->5C(tech trap), his neutral is pretty strong I think, especially after coming from Junpei to him.
I don't find his short hop combos hard though, I do mess it up in less than 3 bars connection though.
However I'm not really finding a place to put my fears at, like I don't think the fear setup is worth the meter, maybe someone has something better?