I claim Coppy is an average GM, not a buffoon. He clearly knows the cost associated with promoting Swanson early.
There has undoubtedly been pressure to put a "winner" on the field in time for the new ballpark. They probably knew Swanson was part of the "winner" they were going to sell to the ignorant fan base to open the new ballpark since the moment Dave Stewart gifted him to the Braves. This is why we see Swanson's face everywhere in interview after interview leading up to this season.
Knowing Swanson would be the SS on opening day 2017, there was no service time to lose by promoting him last season. So in s sense, yes, they said "what the hell" and promoted him to replace Aybar.
That's why it happened, but that still doesn't mean it was the optimal way to handle one of the Braves most valuable assets.
It doesn't mean it was optimal, but it doesn't mean it was sub-optimal, either. I have talked to plenty of casual Braves fans and other people who aren't really even much of a baseball fan at all, and pretty much all of them have mentioned Dansby when the Braves and the new stadium has come up.
How much in additional revenue will that drive? We don't know. But I can pretty much guarantee you it isn't insignificant and could easily surpass whatever we lose by not having the additional year of control.