Originally Posted by
icemilkcoffee
But it is. The fundamental problem with traditional horizontal dropouts, is that if you tighten the QR too little, it slips. If you tighten it too much then your hub bearings are too tight. So it's a no win situation.
I must confess, after more than half a century of riding, I haven't found that to be an issue.
Someone could make a retainer washer, similar to what the OP is suggesting, that attaches to the adjuster screw, which prevents the QR axle from sliding forward on the DS dropout.
Which would obviate the purpose of a quick release. May as well use a bolt-on axle in that case.