Not necessarily. I could see a world in which PG and solo are given a reduced status, like "you can play like this, but you won't affect anything". That would upset a lot of people, due to the original promises made by the devs. But personally I wouldn't think less of FDev if they did break that promise, since a lot of those kinds of commitments don't survive reality.
I most certainly would be upset. I don't want to be a second-class player.
Let me give some reasoning here.
Sea of Thieves was set up as an open world PvP game. I was always interested in it, but never considered buying it because there was no PvE server. Later it piqued my interest when i heard they were adding a PvE mode. Unfortunately (for me), the PvE mode is limited, you don't get to do the same stuff the people can in the "real" mode. I guess there were elements of the playerbase who were not happy with this move, but i guess they were mollified by the limitations in the PvE mode.
And that's cool with me, its the dev's choice to focus on making a PvP game and sticking to their vision, and i guess their idea was to get more people playing the game and then "graduating" into the PvP world.
Now, if the Sea of Thieves devs said they were making a PvE mode that was fully featured, i can imagine there would be an uproar within their community, that the devs were betraying them, going back on the vision (and i guess from an unspoken fear that the PvP mode would become practically empty).
Anyway, what they did was an inclusive move, bringing more players in (maybe?) without watering down their vision for the "real" game.
Conversely, what FD would be doing here would be an exclusive move, taking existing first-class players and making them second-class players. As someone who would be impacted by this, I can only view it as a bad thing.
The only way i'll accept PG/solo players not having an impact on the PvPers powerplay (or anything) is if FD split the servers into PvP enabled and PvP disabled, like exists with a lot of online games. It was figured out decades ago that forcing players into a particular playstyle they don't want doesn't work and that trying to mix PvPers with PvEers doesn't work.
FD should have known this from the day they started designing the game, but like often happens with devs, they think they can deal with it, come up with mechanics that will please everyone... and it never works.
Of course, we all know the problem with that. The PvP enabled server would be a ghost town.