Well on AceM2 everyone was running around with luck+7 weapons too. I haven't seen any here so far, don't know if that's because benes drop less (they still drop a lot from what I can see), work less at higher luck or people just haven't bothered lucking the rubbish weapons most of us still have atm.
I don't think luck on neckies is a problem on its own. It was only when luck+7 weapons were common that it made it possible to cap luck easily.