I feel for you, that’s a tragedy.
There are plenty of warnings on the forum about this (like this one), although i agree that Elektron should advise users in the manual as you suggest
To be fair, the holes have to be where they are as the official rack ears have been established for a long time … further, due to the components, the offset spacing of the board is also set
Mechanically, a screw will only be usefully loaded on a few of the threads, so it was not ever a good plan to trust that a long screw would just work out - i used cocktail sticks to establish how long the screws could be when i made stands
On the plus side, i would suggest that the repair required would be possibly achievable for a competent electronics engineer with a steady hand and a decent magnifying glass
Those tracks can possibly be intercepted and bridged away from the carnage, that way, you may still have access to the contents, obviously proceed with care and if you’re going to replace the board then that could still be an option if you have no computer backup
grim way for you to learn about this though, gutted for you 
and thanks for sharing the warning, hope it plays out not too painful