I'd say that experiment didn't quite succeed.
I would agree with that statement. There are too many fusion cores, too many suits of armor, and they are too easy to repair.
I'd much rather have them ditch the Fusion Core nonsense and just make PA appropriately rare.
At this point PA really shouldn't be rare anymore. The Enclave, the MWBoS, and even the Maxson BoS by the time of Fallout 4, are/were able to make more.
Even Enclave APA shouldn't be that rare anymore really. The Maxson BoS got how many suits from Adams? I'm sure they will make up some bullshit Mcguffin reason as to why it can't be copied or something, but at this point, the MwBoS were doing it nearly a century ago, and The Maxson BoS captured Adams and likely gained the ability to do the same.
Rare power armor isn't, and shouldn't, be a thing anymore.
I'm aware of that but at some point they will need to change things up. It is my opinion that it will get pretty old seeing games either take place in the west or east coast respectively. There is no reason that a game shouldn't take place in Seattle, Detroit, Chicago, or wherever else. I've heard people toss Miami around too which could work thinking back to the proposed sequel to Tactics...and I think Texas would be perfect but you don't think they would disregard Texas due to PoS do you? Obsidian was told to leave out Area 51 specifically for some reason when they were making New Vegas. Bethesda wouldn't do that without a reason.
I consider Seattle part of the western U.S., and Obsidian did mention parts of the pacific northwest in some endings for NV and Honest Hearts, so I think even they consider that part of their territory. Same with Miami, the East Coast extends from Maine down to Florida, so I would assume that was part of Bethesda's land as well.
I don't think they would discredit Texas due to BoS. Bethesda have said they dont consider it canon at all. Is not even semi-canon like Tactics. I just dont think either company has plans for it right now.
As for Area 51, I heard Obsidian CHOSE not to do area 51. Not that they were told not too, but I may have heard wrong.
I agree to a certain extent but Dog City was mentioned for instance and even Mexico so there are exceptions within reason. They could have teased something possibly or added a bit of throwaway lore like they did with Ronto. Just something I would have liked to see. There is no reason not to plan shit out like that when doing world building for a RPG. They probably know where Fallout 5 will take place already. They scouted D.C when they were making Oblivion. I don't expect people to be talking about Missouri when they are located in New Vegas, but they have mentioned several areas that could have been shown.
I think Dog City Denver was mentioned because they know they have no plans to go there, same with Salt Lake City. They referenced it was entirely obliterated by nukes in HH likely because they knew they had no plans to go there in a future game, so they could just in some lore to acknowledge its there. Denver was mentioned by Lanius to have basically no one around it, and its just overrun by dogs. Its not really "game materiel" IMO, so I think it got mentioned because its a major city, and they needed to throw some bones its way since The Legion was out there.
Ronto is IMO going to the "The Pitt" for Fallout 4, which is why they mentioned it before. It and the Abbey of the Road are the only two locations up north they have mentioned outside The Commonwealth, so it makes sense those would be the DLC locations for Fo4. For Fo5 I expect them to go south into like Miami or something, make that the "Broken Banks" they mentioned in Fallout 3 and Point Lookout.
ITs not that they don't talk about other places, its more like they only talk about places they have plans to go to, or know for certain they won't. Tactics sits in a grey area IMO, and I don't think they really know what they want to do with it yet, which is why they kinda avoid it, but keep throwing nods its way.