In my view a good warranty should cover all parts, that are not classed as normal 'wear & tear'
Tyres, Brake pads and discs, Batteries, Oils, Filters and the like, are just a normal part of motoring, all other parts should be covered.
I'm not familiar with the drop link design, but again in my view any drop link should do substantially more than 37k miles. Nowadays an average annual mileage must be in the order of 10k per year, or 30k for a 3 year warranty.
Certainly it is for me and I would certainly go to bat on that one!