Capcom probably wouldn't revert those changes back because:
- If they make a Switch MH game, they would still want it to preform as good in the west, and they largely attribute that to those changes
- There's no real backlash to those changes either oversea or in Japan that would make Capcom go "we need to revet those to gain that 1 million lost sales back"
- Even in an imaginary scenario where that backlash exists, and is the cause of the lost 1m sales in Japan, Capcom will still take the increased sales those changes brought in the west over the lost Japanese sales, even for a Switch game
There is evidence form Tsutaya MD observations, and Capcom's own surveys, showing that MHW sold to two main groups in Japan
1) MH fanatics who will play every MH
2) PS only gamers who last MH game was on the PSP.
Given the low rates of multiple TV ownership in Japan, we can easily surmise that kids and young adult casual MH fans are not catered to by MHW.
A NSW MH can reactivate this audience, and if the game is good enough (big IF), the MH fanatics will follow. This will allow it to hit what MH4 achieved at best (∼4.0 million). The western and WW potential of such a game is probably lower, but it would be a disaster if it doesn't hit MH4 rates of 1 million, 2 million is a the highest it can go probably.
It's viable (6 million sales WW) but I don't think Capcom will do MH anymore on NIN platforms.
1) Tsujimoto Elder wants all Capcom SW sales to be majority (80%) from foreign markets. The split above is not favorable to his stated strategy. He has stated this on national televsion.
2) Tsujimoto Jr attributes the success heavily to the shift to high specs platforms which allowed MHW to be MHW. Both Tsujimotos have said that HH is the reason MH was "held back" on the record. Even if we take NSW as a home console and Not a HH, it is still a low spec machine that doesn't fit with Tsujimoto Jr's own view of why MHW is successful. He has been saying the same thing in every interview in any national newspaper/magazine.
3) Capcom internal developmemt resources are probably stretched thin as they have ongoing content creation for MHW, and two large scale AAA games coming. I cannot see anyone team actively workIng on MH NSW in this time. The lack of developers has been a problem for Capcom for at least 3 years.
4) MHXX will fail in the West. This will give Capcom the perfect "out" from making another MH for Nintendo platforms ever again. It will be BS of course, and Nintendo knows, but this is an easy way to deflect shareholder queries.
5) The Sony marketing push was tremendous and it is highly likely the game is associated with the PS brand now, especially in emerging markets like China. Capcom doesn't want to risk audience division that is built up at Sony's expense.
6) MH is now a premium Capcom brand that is going to be a premium product, much like how Resident Evil is. You can easily get how Capcom will treat NIN systems just by how Resident Evil played out the last two gens. MH isn't like Megaman or AA games that Capcom shits out to make quick bucks.
7) MHW still has its G version and significant post launch content lined up. They have indicated they planned to support the title for a year, but nothing indicates they will not pull a SE and start charging for content expansions beyond that one year.
The fact is that Capcom is trying to position itself as a maker of AAA console games that are primarilu export-driven, and exported to growing markets overseas. Instead of selling to the dead console home market and the mobile home market which it is not competitive in, this is the corporate strategy the Tsujomotos sold to investors.
As such NSW MH is anathema to what the Tsujimotos envision their companies' future to be, this is why I doubt any high effort Capcom game (MH or not) will come to NSW