It's a single trailer, we don't know a thing about what it actually is yet(besides that it's supposedly an action game, for what that's worth). Did you play MGS5? The gameplay is rock solid(probably the best in the entire series), the only real problems with it are it suffers from a lot of the common open world issues games these days have, and that it was clearly rushed out the door before all the story content was complete(much like SW: KOTOR 2). I'm unhappy that Silent Hills isn't happening but you can't blame that on Kojima, blame that on Konami, the company that clearly wants to get out of the game industry(and it's not even like before Silent Hills/PT they treated the SH series great, that HD collection was ****).
MGS5 is easily the best cover based third person shooter there's ever been. If people are underwhelmed by one of the best gameplay experiences of the last 17 years than maybe third person shooters just aren't something they should ever play. Wonder what those peoples reaction to Mass Effect, Last of Us, Uncharted, and the 3D GTA games have been?
I wish I knew anything that was being said during the Persona 5 footage.