2 points-
1/ it's not a finely tuned/ weighted/ balanced 10th of a second hunting racer, so the extra weight won't matter
2/ the adhesive they used is where the problem was, knowing it use to be a problem just means you can take the pre-emptive steps in preventing it happening again
Plus I imagine it'll be garaged, used as a weekend car and be well maintained,
Mate if the car is cared for, ya won't have issues, my 94 GSR roof had the original skin, was garaged its whole life and it didn't even have the signs of wanting to rust,