Lottery ticket reliever was probably hyperbole, but if his arm injuries mean he can’t be a starter, the guy is no longer a “top prospect.” His top prospect status was very much tied to his potential to one day be a #2/3 starter and that ceiling is gone, at least in the eyes of the Sox medical staff. So no, they aren’t going to be trading “two top prospects” if they add another asset to the deal. And Maeda on a moderately under market contract for 4 years that only pays if he’s healthy and pitching is quite valuable for a lower payroll team.
And really, my initial point was simply that it is entirely reasonable that LA expects the Twins, the team trading a now devalued asset, to make up the gap. Whether they actually will is TBD, but LA taking that position is in no way unreasonable.