The Falcon is stitched into the ST’s DNA. No amount of rotoscoping can change that, since almost every scene with the Falcon relies on it being that particular vessel of nostalgia.
I’m not sure whether or not you mean nostalgic for the viewer or the characters but ether way, I completely disagree.
If you mean for the characters - There are only two scenes as far as I remember that reference nostalgia so far. One with Luke entering and turning the lights on and “Chewie, we’re home”. These can easily be cut or, if really needed, changed. It’s not like they constantly talk about the old days while aboard it.
If you mean for the viewer - While the final film isn’t out yet, I’ve started doing some background replacement in advance for my “Sequel Trilogy Redux” and my son became interested so I showed him parts of the film that I thought might hold his attention while I pointed out characters and names. One was the escape from Jakku and he really liked it, mainly BB8 who he calls “Baby 8”. At no point did he say that “the Falcon held the scene together due to nostalgia”. To him, it was a new ship, it could have been any ship. It really doesn’t matter what ship it is, the Falcon isn’t necessary.
The only scene that I would agree with you on is with how Han picks up Rey, Finn and BB8. The Falcon is needed for Han to be searching for it and he found it because it can be easily tracked (which is flimsy anyway, I can poke holes in that). But since I want to have Rey follow BB8s instructions on where their base is and head straight there, where Han is still a general, this whole scene is scrapped for me. Falcon not needed.
I think the trilogy should have its own ship. The Prequels had Padme’s ships, which, while different in each film, all had the same interior, as well as the same chrome texture on the exterior. The Originals had the Millenium Falcon, obviously. The Sequels have…also the Falcon. How about the Falcon is destroyed when it crashes on Starkiller Base. All subsequent scenes featuring it would have another ship in its place. I really hope Episode IX introduces a ship like this to make adding more natural, not to mention not having to design it ourselves. The main issue will be rotoscoping the characters whenever they’re in the Falcon cockpit to place them in the new ship’s cockpit instead. That would probably be a nightmare. We could simply cut most of those shots, since they aren’t that important. We’d be cutting the shot of Luke in it anyways, since all he does is look at the familiar cockpit and retrieve the dice, none of which works if it isn’t the Falcon.
If this were done by someone else and it was good enough, I’d consider asking permission to use it. For me, however, it’s not a big enough deal for me to want it changed since I think there is so much other work that needs done. Whoever did this would probably need to have experience in 3D modeling/animation which I don’t have. Maybe the OP does?