After some 25+ years modding anything that moves inc track cars I know what camber is, and it most certainly does not eat edges, the reason being the tyres have flexible sidewalls, resulting in even pressure over the contact face of the tyre to the road, read herb adams how to make your car handle book, don't have to trust him but F1 teams have for years, you may know better.
The reason why the TOE is killing the inside edges is because it is the FRONT of the tyre being effectively scrubbed against the road, so this bears the brunt of the wear.
Just think if camber did the tyres in you'd have no coaches or be able to take passengers as suspension travel would induce more negative camber killing the tyres, and the few cars that have POSITIVE camber also kill the inside edges when the tracking is out, which of course goes against your theory.
Lastly blackcircles, who I used only two weeks ago to deliver these exact tyres.
If they can use them in the us and canada where temps can be MUCH lower than ours there is no problem, read the tire reveiws.
As the uk has not cottoned onto winter tyres, and summer tyres but instead remain with all season tyres there will always be problems with tyre compounds becoming harder at lower temps, winter tyres adress this problem with different compounds.
I've driven in excess of 2000 miles on the hankooks, they are no different to most in the severe cold, but better than a few others.
I think when people see "summer tire" written they assume it doesn't do winter, not true, a summer tire will do winter, obviously not as well as a winter tyre, same as winter tyre in summer isn't best.
I have not found a problem certainly down to -3C, the uniroyals did suffer until heated a bit, but not these.
I think a lot of the problem is what each means why winter, over here it is around 0C, to a tyre maker making tyres for siberian trucks it is up to -70C.
They are happier above about 5/6C but certainly not dangerous below it, can you name one person in the uk who has summer tires and winter tires and changes around as need ?
tabetha