Lmao it's just a transient fad where a few get established, and everybody else tries to become part of the small circle of the TOP GAAS. The more companies try to make GAAS games, the more they prop up the established franchises as a model and genre worthy of gamer time investment. It's called conditioning and it works on the human brain like a charm. Moreover flooding the market with these titles creates little differentiation between the releases furthering their potential doom and chances for a DOA or mid, non-lasting releases (furthering the hold of the established franchises). We've already seen this in spades.....and Sony releases will be no different. Now you can claim the Sony and Bungie's seal of quality "supervision" will make all the difference where others have failed but there is no guarantee. Sony games got to where they're today because they saw a niche that become underexploited due to the FPS rush and exploited it - that is, AAA, expansive, cinematic single-player experiences. Completely different approach, trend-setting as opposed to trend-following.
Sony has a bunch of GAAS lined up hoping 1 makes it through, knowing full well most will flop, and the ones that will flop will do so more than likely horribly... with a few that will fall into the "underrated" category that will meet the same fate all the same.
This is no different than the FPS craze at the beginning of the PS3/X360 generation after COD4: MW and Halo became a big hit. Unlike the past at least Sony is able to profit by buying Destiny outright this time around, and courtesy of being the market leader, benefit mostly from the success of the fad through the royalty process as a middle man, as opposed to sharing with MS more or less 60/40 during the X360/PS3 era.
The graveyard of non COD shooters is big. Killzone (almost killed Guerrila), Ghost Recon (killed the studio), (MAG - killed the studio) etc etc...
That's the problem with FADs, you gotta be one of the very firsts and establish yourself quickly, cause the party is over quick, and it's extremely hard to get a ticket in late.
What you want to be, is a trendsetter, not a trend follower. Sony with the GAAS push is a trend follower, allocating an immense amount of finite resources to that.