When K'9999 got replaced by Nameless (probably because they got tired of the same old Tetsou from Akira reference that K-4-9 is), SNK-P did something right by replacing him with an incredibly new awesome looking character design that makes Nameless undisputedly way better in every way than K'9999. Cooler voice, cooler personality, nice clothes, nice new character persona, nicer looking animations with all his special moves and DMs.
He's definitely one of the best "new" chars in kof. It's cool to play an old character with a completely new look. He even outshines K' and Iori in terms of "cool" and "badass" ness.