Wow, sorry to hear your misfortune. Only warranty experience I had were all on Ducatiís (go figure). From shift forks to bad hydraulics in the brake and clutch to hot start problems to bad fork seals to simple buttons not working... list goes on with Ducatiís.
As for re-engineering the parts, they only do that if itís more cost effective to spend money towards R&D than to replace the engine. This kinda goes hand in hand with recalls. If enough people sue and the cost of damages exceeds fixing the problem, then they issue the recall.
If the problem isnít common, they will try to find anything that says it was your fault so they donít have to pay. Otherwise, only when it is deemed a manufacturers defect, you will be covered. Hopefully in your case itíll be covered. Good luck!
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2014 HP4 #5060