All stealth games are still action adventure. Even right down to Metal Gear. The main part of Tsushima's battle system was that you could change from melee to stealth and both systems were given equal attention, stealth wasn't an afterthought it was it's own mode that the player could choose.
None of the titles that Embracer bought would have given sony an inroad into a genre they don't already have covered in some form.
There is a fundamental difference between a stealth game and an action adventure game. Its literally in the names.
A stealth game focuses on stealth, and only stealth. Action is, at best a last resort, at worst, completely impossible. The only viable route is stealth. The games mechanics are built around stealth. It is literally about stealth and nothing else. Combat is limited to mostly knocking out or assassinating guards without being seen. Open combat is somewhere between being discouraged and outright punished, depending on how unforgiving a game wants to be.
Action Adventure games are built around two thing: action and adventure. They may have stealth mechanics, but that doesn't make them stealth games. They may have driving mechanics, but that doesn't make them a driving/racing sim. Breath of the Wild allowing you to ride a horse doesn't make it a horse racing game. Because those aren't the game's fundamental mechanics, nor how you fundamentally engage with it. These games are built around action (aka combat) and adventure (aka exploration). Not stealth.
The main part of Tsushima's battle system was that you could change from melee to stealth and both systems were given equal attention, stealth wasn't an afterthought it was it's own mode that the player could choose.
Which makes it, fundamentally, not a stealth game, because the combat was just as viable as the stealth. In a stealth game, the stealth the only viable way to proceed. Combat is a last resort and inferior to the stealth. You can go through Ghost of Tsushima without being stealthy even once. It is, fundamentally, not a stealth game.
None of the titles that Embracer bought would have given sony an inroad into a genre they don't already have covered in some form.
Sony doesn't make stealth games like Thief. They did have Sly Cooper, but they haven't made one of those in years, and Sly is not as hardcore as thief, so they have slightly different audiences. Sly is a stealth platformer. Thief is a pure stealth game.
Sony doesn't really make western RPGs like Deus Ex. They made JRPGs, once upon a time, like Wild Arms, but they haven't released one of those in years. The closest they get to those now is Demons Souls and Bloodborne, but FromSoftware is too busy making money on multiplat titles to focus on Sony.
Sony doesn't make anything approaching the dark fantasy action adventure masterpiece of Legacy of Kain.
The only title your statement is true about is Tomb Raider, because Uncharted is basically a Tomb Raider clone (which Tomb Raider itself later lifted gaming concepts from).
And those are just the games we know they are getting from Squeenix. We haven't even gotten to the other 50+ games they are receiving from them. I don't go through them because we don't know what they are.
