Stryker's popularity has skyrocketed since his old UMK3 self, he's actually liked and respected by a large portion of the community now. He's not played often because he is indeed lacking tools and possibly bottom 5( key word possibly).
I already had a theory on the MK10 roster, Smoke, Jade, Nightwolf, Sindel, Kung Lao, Jax, Kabal, Sub-Zero, Kitana etc all died too, they're going to be fighting alongside Shinnok's Netherrealm hordes, so I logically deduce that they'll all be playable and enemies in story mode.
Stryker's actually liked decently in this game, like I said he's just not "good" in this game.
Plus MK needs to get a consistent roster instead of flip flopping every game, maybe NRS will finally pick up that concept, story mode should not dictate the roster.
Also, they better not leave him out because he's bottom tier, they're the ones who made him that way....it's not his fault or his fans fault they opted to give characters like Kung Lao, Sonya, and Cage a plethora of tools, while leaving him with mediocre tools.
I have no problem with a character being bottom tier or characters being good, but leaving someone out because they're bottom tier makes no sense to me.