There are others on this board who would fundamentally disagree with your comment that the ECML electrification was done 'on the cheap'. Given at least one was involved in the project, I think they're far better qualified to talk about it than you are.
There's an interesting piece by Roger Ford in the July Modern Railways about the RAIB report into the OHLE failure at Littleport (Ely-King's Lynn line) last year.
This suggests maintenance methods may be more significant in failures than perceived design issues.
This is not the high-speed ECML of course, but it is the same design of OHLE (Mk 3b).
It shows how flawed maintenance methods (inadequate processes, records and tools) led to a dewirement, in this case due to ground movement over the years.
It makes good reading.
It might also explain the very heavy design of the OHLE going up over Chat Moss just now.