I understand that but disagree. Moving keycapses may be useful to adapt if you will going to make your job with the new layout immediately, without an option to switch back. Especially when you are living qwerty. Let your friends to type on your kbd to share the good idea about existing of non-qwerties. Let your eyes to love a new layout. BTW Colemak is not so non-qwerty so my opinion it is OK not to move capses for Colemak.