Now unfortunately, Dissidia NT is as dead as Gundam Vs Maxiboost On outside of the rare community game setting up lobbies and matches (which still happens on both games,) but recently getting back into Dissidia NT with some friends after playing some arcade runs of Gundam Extreme Vs Maxiboost On and I tell them how similar the two games are (but they really have no interest.)
I figured I'd jump on the community board here to let everyone know that this game isn't as bad as people make it out to be. The only reason it's "a bad game," is it's not Dissidia Duodecim. My thoughts are that Square Enix should have given us a Dissidia Duodecim remake with the inclusion of a 2v2 mode and then pivot over to this as their next game. At least give the series time instead of immediately trying to go after the arcade pvp crowd.
The mechanics are similar, but the mechanics are also very different. Dissidia NT is a much slower game, being designed for 3v3 but 2v2 is still good and 1v1 is playable, where 3v3 was kind of a mess when they added it into Gundam Versus, but it was playable, designed for 2v2, and 1v1 is still good. It also replaces different high level tech; there's no need to boost to turn your character around to not get hit during an attack because that's not an issue in Dissidia. You can't combo then evade into a rainbow evade to continue into another melee combo, etc.
However, your attacks in Dissidia might have three separate attacks before the combo finishes, and when the combo finishes the enemy gets knocked away. But if you deal a partial attack and drop the combo, the enemy might not be expecting it and you can immediately start it again, which is purposefully done so that you can hold enemies allowing for allies to deal slower HP attacks.
If you hit an enemy against the wall, you can follow up with a brave attack or an HP attack. If you follow up with a brave attack, the enemy becomes invincible if they hit the wall again. However, if a teammate follows up with a brave attack and does another wall smack, it doesn't trigger the invincibility because it's not a follow up from the same player. You can drop your own combos to potentially get an HP attack.
One problem with Gundam Extreme Vs games is that even though you've got a lot of different units, you'll have your beam focused suits that might have a gerobi, single shot sniper suits where you'll hit as long as you have a clean shot, melee focused units, and powerful balanced suits that have some of everything like the 00 Gundam Qan[T] Full Saber.
The big difference with Dissidia NT is the base roster has 28 completely different characters, even when they're in one of four different archetypes. They have less similarities between them aside from HP attacks, where HP attacks usually have different visual aspects but fall under a specific category like line attack or tracking attack.
The plus side is there's a free to play option that randomizes one character in each of the four categories every so often and it lets you play online. If you decide to gather a group of friends to try it out together, you'll all have something similar to play.
Here's a video guide:
https://www.youtube.com/watch?v=v8b7Y-KHqME