User blog comment:Omega natsu2/Chapter 352: The Flame's Voice, Predictions./@comment-3290324-20130917180844/@comment-7418318-20130917210835

So Lucy already has two very good reasons to learn re-quip.
 * 1) to be able to have her keys out of the enemies reach until needed
 * 2) to be able to easily replace her cloth that get ripped to shreds almost every fight.