Sony have a good selection of studios but not all of them are constantly good like ND,MM and PD, they should do better quality control and improve on the shortcoming that some of their studios have, for example..
Guerrilla Games: need better stories/writing in their games, they never got this right, I did some checking on the credits of Killzone game and didn't find a "creative director", this position is responsible for the overall writing/ characters/ embedded storytelling/ world feel/immersion/ pacing.
SSM: they need to take GOW to the next step in both game play and story, after 6 games, gamers want to move on, they must find a way to recapture that sense of amazement we felt with the early games, they should have done what Jeff planed to do and evolve it into a non-liner inter connected game world like Zelda/ Batman Arkham.
Japan Studio: they should be more ambitious, they have been making small scale games for a while and they have the talent to do better and bigger, now lets look at how the studio can improve..
- Gravity rush is a great fun game with originality, the challenge mission were well done and made me come back for more, but the limited budget for the game held it back, they did try to compensate using creativity by implementing comic book style story panels, but the experience would have been much better with voiced and animated cut scenes and more interaction with in the world.
- Soul Sacrifice: the game is great on both SP/MP, the dark story is fantastic, but like Gravity Rush it is held back by presentation, this time only using narration and some illustrations, also the game has huge franchise potential and should not be tied to only the Vita, Sony should seriously bring this to the PS4 and recreate the wold using next gen graphics, this game has the potential to replace GOW.
Evolution Studios: with PD already making the worlds biggest driving franchise Evolution have a crises of relevancy, they should just be restructured to assist on GT development or try making another genre, maybe take a crack at a Twisted Metal reboot.
Quantic Dream: yes I know they are an independent 2nd party, but it wouldn't hurt to give them constructive advice and a bit of needed hindsight, Beyond was a very well acted and presented game that kept me intrigued throughout, BUT! the game design that was intended to make the game simpler actually made it cumbersome, walking from one place to the next ended up being a chore and ended up breaking immersion many times, Telltale Games do these adventure games better and ironically they were influenced by Heavy Rain, no shame in QD taking inspiration in return.
now lets talk about the man in charge, I think Shuhei Yoshida is a great guy and good at developer relations but I have to say he misses many things when it comes to actual game production and supervision, sometimes being very hands off with games like StarHawk and Twisted Metal, they were good but could have been great. SASBR could have done with better presentation and less self indulgence, filing it with b-list 3rd party characters didn't help, the MP for GOW:A was out of place, a co-op titan hunting game like Monster Hunter would have been more fitting IMOO.
So sometimes Sony 1st party games end up great and sometimes they are a miss, they are not as consistent as Nintendo because they don't have a legendary game designer like Miyamoto supervising overall. I think Sony should put together a production supervision team selected from ND and MM and also bring in Keiji Inafune full time, he did a great job producing Soul Sacrifice.
Also Yoshida infamously passed on publishing Daemon Souls because he thought it was "crap", he also has a bad "hands off" policy when it comes to matters of publishing exclusive 3rd party Japan games like Tales, Yakuza, Suikoden, Valkuria Chronicls3 and left gamers alone begging publishers without doing things to help on PS gamers behalf, I know it can be done because MS(in the good old days) worked with Namco to publish Tales of Visparia in the west only months after the Japan release. now Sony have a "3rd party production" team so I hope addressing this issue is part of their mandate.
one last wish I have is for Sony to make a SP expansions for DCUO, people want to play as Superman/Batman/GL/Flash, make them based on Classic DC events like Crisis/ Blackest night, this would really be awesome and will very likely bring new players to the online game.