Nah, Bluepoint are good.
Haven is totally unproven and need to release something.
However I'd like something beyond a remake studio and a fledgling studio to be added to the roster, something with actual valuable IP's.
Release Bluepoint on the back catalogue of Sony IP. There is a lot of quality there. Bethesda was bought as MS First Party IP isn't as deep as Sony's.
Of the PS partnerships currently announced, there won't be attempts to buy them until they are proven, just like previous studios.
It takes time, no need to buy SE as the main games are tied to PS (see FFXVI) so no need to buy the lot if they are open to exclusives with the big guns.
I can't see Konami selling but I'd love to see their IP licenced out for Sony to work on.
Capcom should have been bought before they turned things around. More expensive now and better off keeping a partnership between the two. Of the lot, that's the dream studio.
Even if you want the big publisher bought, I'm okay with this acquisition. If Sony buy too much too quickly, they could mismanage the studios.