I dunno if they are smarter or it might be actually that simple to understand for people who don't have a particular attachment to tos, or don't think too much about all the details. In a sense, reboots/remakes are perceived as being AU of the original by default and with that assumption already, most of the audience and casual viewers might simply think, which is the truth, that this is like any other remake with the only difference they made it canon that it's an AU. In either case, I don't think they'd perceive it all as something that needs to get 'restored' or something. If people really need a time travel storyline (I personally don't need it/I'm not interested), I think that what they could do - in respect of this canon and the kind of time travel devices used here - is a scenario where this crew goes back in time and creates another reality ('creates' is our definition. They'd just access to a parallel reality that 'already exists') where some things didn't happen (such as the kelvin accident or the destrouction of vulcan). It wouldn't be a 'restoring the timeline' thing but, rather, they'd essentially find themselves doing what Spock Prime did and, like him, face the risk of being unable to get back to their own reality and thus get 'stuck' into this other. Like Spock Prime, their reality wouldn't merge with the other one and they wouldn't replace their counterparts from another reality. They'd co-exist with that other version of the characters just like Spock Prime didn't replace kelvin Spock and he co-existed with him. This is the only scenario that would make sense for the rules of this trek, IMO, hopefully with a twist that in the end, unlike Spock Prime, they do find a way to get back to their own reality.