I think that the oversized bolt holes is just to allow correction of alignment when cheap manufacturing methods are employed and also when slight body/suspension damage issues need to be cheaply resolved.
I initially considered buy a service kit of eccentric dowels to let me return the front cross member to the original position on a 2002 VW Polo when its horrible ARB plastic end stops broke free, I gave up that idea and when that car was just over 4 years old I handed it into a VW
dealership to swop over the ARB for a new one with metal welded end stop collars, that repair included a full 4 wheel re-alignment, shortly after that I replaced all 4 tyres only to have that car fail its next MOT 11 months later for excessive wear on the inner edges of both front tyres, how did I miss that!! A pair of new tyres followed by another proper 4 wheel re-alignment sorted that issue out for the rest of that car's life with us, ie 13 years and 135,000miles - it was the same VW
dealership that carried out the second full 4 wheel re-alignment, so all I'm offering here is, any 4 wheel re-alignment is only as good as the bench and the operator - that sloppy first re-alignment cost me 2 new 15" Michelin Exaltos but I did not think that I had anything to gain by complaining as that car could have been bad abused over the follow 11 months from the first 4 wheel re-alignment - very annoying!
I also had a very bad 4 wheel re-alignment experience from a SEAT
dealership, older daughter bought a used
Ibiza 6K, one side had +ve camber and the other side had -ve camber, "no fault found, car okay" I said not so, next attempt "no fault found workshop foreman has checked and driven the car", I demanded that the foreman came out and looked at the car, all he said was "okay it is out", then took all day to find a place that had a full set of working bench cables!! Sometimes you end up dealing with idiots who are masquerading as competent highly skilled techs, they might have the paperwork, but can't do the job!
