A lot of people felt the same about Cambridge Studio, we heard they were a great tech team and helped a lot of WWS teams with their games. But you're right Manchester Studio and Pixel Opus teams are recently created there is no way Sony will close them down so soon.
Great tech team != R&D. London Studio have had their hands in a ton of stuff Sony's done over the years, particularly PSVR right now.
As for the other stuff, I'll answer it below.
Yes, I am theorizing(sorry If I led you or anyone else to believe otherwise) based on the news I posted above and general industry trends, Sony may make GaaS projects or may not and I certainly hope they don't pursue them.
See, I don't have a problem with them pursuing GaaS, in fact, I hope they do. Sony's published a number of great games over the years that'd be perfect for the GaaS treatment. Gran Turismo (which they're obviously pursuing, though they maybe went too deep on GaaS and left behind a lot of their single player fans), LBP, Warhawk, SOCOM 2, Killzone 2, TLOU MP, Uncharted 2 MP, Wipeout and so on.
What I object to is the idea they'll invest less into single player games next gen and that Kodera is somehow going to force them to move to GaaS. First off, Sony's meant to be a pretty hands-off publisher and I find the idea of Kodera suddenly changing that pretty doubtful. Second, it's not like they're going to cancel or meddle with studios/series that are doing well, they might introduce some GaaS stuff into some of those games but it's not like they're going to force Guerrilla to turn Horizon into a mindless co-op game like Ghost Recon Wildlands or whatever.
Naughty Dog said a while ago they will start doing on multiple games and not just one, plus the re-release of Jak And Daxter (and the enire franchise for a later date) as PS2 Classics on PS4 and even its offering it with Uncharted:TLL pre-order isn't innocent. If the series is dead and buried this would have never happened. The series was frozen for a long time and not dead, so it is time to revive it. And I see no reason for many to get offended if this flagship series comes back. People asked for the return for long time dead very limited series and they got what they wanted and they still ask for others.
Key part: "A while ago." Things change. Just a few months ago Naughty Dog were saying they'd given up on having multiple teams and were happy with their current 1.5 teams structure, with one game in full production and one game in pre-production at a time.