barit1
I see it a little differently. RR has been tweaking this design (kudos) for a while, and certainly not adding weight. To the Contrary. Pushing a design to its Thrust-Weight-Service limits is a design goal. Overbuilt is overweight. Overdesigned is a realization just this much past a functional limit. One can get too cute (not here), in asking just a bit too much of a powerplant. Margins are trimmed, weight being one. Weight can mean strength, or durability, or waste; the engineer, test will decide when to stop.
Just a different viewpoint, I don't mean to impute an application of this opinion here.
It is when things start to occur that are previously eliminated from consideration start to happen, that design issues are raised, IMO.
Relative to this occurrence, I see an attempt to suggest a little mystery, and a pinch of poor work by someone "else". This failure, I think is pretty straightforward, after all.
bear