That video on what NT improved on versus the PSP games was spot on, by the way.
As loved and popular of a game that was, Duodecim broke the game hard in terms of being a good, competitive PvP game. I loved the game but playing it competitively was fucking garbage. It already had limited options for PvP thanks to no online mode. Combine that with the brokenness of assists, Brv to HP combos, HP spam and equips, and competitive play died pretty fast.
NT may not be popular due to it being a team fighter and requiring a team of people to play effectively, but when it happens and people play, it's actually fun and not random, broken nonsense. The system for the game lends to actually getting to play and do stuff and not just getting massacred in one single combo.
Koei Tecmo really should really do a version that's single player. Or.. Fix the AI, and improve the netcode so matches online are faster and less laggy. A more fleshed out single player campaign couldn't hurt. Especially to include all the new DLC additions.
Like, there's a really good game but it needs more work and better ways to do teams. Team fighting games are hardest to get going outside of arcades due to the number of people necessary for it to work. And arcades aren't so popular anymore so it really sucks.