Honestly, I am not all that familiar with NISA's track record in general, but with the Ys 8 collaboration specifically they managed to mess up seemingly everything they touched :
-The translation was terrible to the point where they had to redo and redub basically the entire script after releasing the game.
-Beta testers found the PC port so riddled with technical issues that that version (originally promised to launch on the same day as the PS4 version) wound up having a delay announced literally a day before it was supposed to release. Jury is still out on how well that version is ultimately going to run, seeing as how four months later we are still a couple weeks from its real release.
-They even managed to foul up the game's box, where they erroneously list non-existent Vita cross-play functionality and the section that details the features in French contains actual gibberish.
Other companies have expressed that they would be more than happy to port/publish Falcom's library, so I do not see a whole lot of upsides to continuing to work with NISA after this.