Hi Maximilian,
I would never reduce the heel height! Because of several reasons:
1. My own experience is that the heels of my boots often tend a little bit to bend forward ("kicking under"). Especially if guys are wearing them on the street. May be because we aren't walking like female cat-walk models who are putting their heels and the foot balls simultanously onto ground.
2. In street walking the heels have usually the first contact to the ground. The normal walking style with rolling foot steps. Therefore my block heels are always worn-up at the rear side. Reducing the height of the heels would make the problem only worse.
3. I agree to the others. Four inches aren't the ultimate challenge. It's my favourite height for alldays street heeling. Practise a little more and later you will be glad to have never misshapened these wonderful boots
micha
PS If they should be simply too high for you and bigger than EU 43 rsp. UK 9 send me an offer - I'll buy them at once for any reasonable price!