Street Fighter V could have done better if it hadn't had to leave out the Xbox. Capcom did have a way around that that I was hoping that they'd exercise. Street Fighter EX Collection and Street Fighter EX4, that could have been pretty wild. Arika's been doing pretty good with Fighting EX Layer, I'm sure that they would have been open to returning to a partnership with Capcom.
Soulcalibur deserves much more sales.
Soulcalibur 6 is incredible.
I'd blame part of that on Sony. Them buying up exclusivity for 3, probably helped to set it back on other platforms. If 4+ came to Sony and Microsoft systems, but Nintendo was left out. Definitely due in part to power, but I have a feeling that if 3 had of released for Gamecube with sales just as solid as 2, Namco would have seen fit to keep the Wii/Wii U/3DS/Switch in the loop on some of the releases or with their own separate releases.
Namco probably thought that it was fluke with 2 due to Link's inclusion and the Nintendo of that era also kept very strong grudges against companies when they felt that they were slighted. They help to develop Smash now, but I can only imagine that it took them a lot of time behind closed doors to get to this point again.