The problem with baseball replay is that it seems like it is mostly used to call people out sliding into second, just because their body bounced off the bag for a microsecond after easily beating the tag. If the out isn't visible to the human eye without zooming into the base and going to slo mo, I'd rather he be called safe.
i would agree that a guy coming off the bag for like a microsecond is antithetical to the spirit of the game and should not be eligible for replay review, they should only be allowed to evaluate whether or not the tag happened before the runner reached the base or not. but i mean...first and third with 1 out is a very different scenario than man on 3rd with 2 outs and quite frankly, that sort of scenario would happen all the time because of how frequently first base umps get the out at first call incorrect.
For that matter, i really see absolutely no reason why they don't have robots calling balls and strikes. Other than some of you dorks going "harumph harumph i'm a traditionalist" there is absolutely no value in having something so objectively quantifiable be left to a guy wearing a protective mask whose only vantage point doesn't even let him see the entirety of the pitch. If they had the technology for it back when baseball was conceived i'm quite sure they would have used it. You can still have a home plate ump for keeping the peace, calling safe/out on plays at the plate, granting timeout, and whatever other duties the home plate ump has aside from calling balls and strikes