As an Akira main back in DOA5, I always did think he was a slept on character. Guy's got some awesome moves. That said, imo Hayate was the best character in DOA5. Now that character I felt, had everything he needed to win. I believe Japan also felt he was the best character too.
shame he wasn't more popular despite his strength, but him being hard to play and not a waifu made him a complete dud with the larger casual crowd and mostly a character for enthusiasts, so yeah, strong af but woefully underrepresented