People stating this game flat out sucks, is somehow abysmal or whatever are just being silly. Objectively speaking this game is solid, it has received the most DLC and even add on story mode that created some extra hours of fun. It easily is improved over Injustice 2, can be considered better than X, beats Tekken 7 by a long mile, is much more strategic than SF5 and Fighterz and at least with customisation allows you to have some fun with characters that otherwise would be a bit bland. Most people agree that the lack of patches overall is due to a very solid foundation. So irregardless of your subjective opinion, objectively speaking this game is solid. Period!
Now, as far as the question itself as to what the game's legacy would be if this is it, then I have to conclude that it is not good and that is largely subjective. Not necessarily due to how the game plays, but due to a serious lack of attention to some glaring issues that shows an arrogance and lack of connection with the fanbase. On top of that, the game has done so well, looks gorgeous, has so much content potential and with the statement by both NRS and WB that this game will be supported for a long time they simply cannot get away with stopping after not even 2 years. We have every right to feel betrayed, for the lack of a better word.
We're seeing studios change their strategy, SF5 actually supporting for at least one more season than they wanted to, but at least this is for the better, since it also comes with more gameplay features, balance patching, extra stages etc. And fighting games in general seem to have longer support and more seasons of content than ever before. It's not that crazy to see a 3rd or 4th season of DLC content. For NRS to win all these awards, be this successful, have an actual select screen that is uneven and datamined to be at least 5 more characters, make grand statements and to actually say before KP2 that they were not done yet, and now be done would be bad.
This game, for as gorgeous as it looks, still feels like it's missing that wow factor and something to draw you back in. A new finisher, extra Fatality or anything of that nature is not that appealing to me. That won't change the actual game experience that much. I welcomed the stage fatalities and friendships for sure, but that doesn't last. Now if they add some more moves to the characters in the game, that would go a long way to at least extend its run. There's so many classic moves missing that I would love each character to get 1-2 more moves. On top of that, a certain EX combo - faster, like in UMK3 - would be a game changer.
Right now, it just feels too much like a prettier version of MK2 with more stages and more characters. It's very calculated and "stiff", which I actually like, but like how UMK3 improved upon MK2 by giving us more combo options, I'd feel it would be a warm welcome for MK11 to feel like a truly Ultimate version of the original game. What doesn't help is how a lot of stages are rather forgettabble, partially due to music, but also because it's 90% in a confined space. What partially drew me to MK was the setting and how you could be fighting on beautiful outside locations with lots of things going on in the background, see off in the distance and actually be part of a world. Rigth now, it's kind of difficult to feel that way when even the Fire Garden, Desert Command and Tarkatan War Kamp feel very confined. Only Kronika's Keep kind of has some depth.
The characters we have now offer plenty of diversity, but the Aftermath and KP2 followed so quickly one after the other, that the game just feels stale. Now, I'm not going to act like other fighting games didn't have any flaws in terms of content and communication regarding extra content. There's been up to year of silence from various studios like Capcom and Arcsys for SF5 and DB Fighterz, so that's not an issue per se. However, the rushed movie skin pack and underwhelming KP2 - Mileena felt like a cheap copy paste job and Rambo...meh - so it's not like they went out with a bang. Aftermath was a straight dump of all content at once as well. SF5 gives us steady new content in terms of characters and stages. So just 5 or so characters would be nice, but honestly to me would not satisfy me. It would be nice for a week or 2 to play a new character, but with no new stages or anything new gameplay wise, it would be soon over after that KP3 is done.
All in all, I'd welcome anything at this point, but just a KP3 would be the least to at least bring me back to the game since I play maybe once a month max and am pretty bored after a few matches. I'd need some serious new moves, a new gameplay mechanic and some stages to really feel like they give us the best MK11 we would love. The game itself is definitely solid, but all in all if this is it, it's very disappointing.