I dont see any need to make it optional. because all that will happen is people will not use it at all. This is I think more ab out people wanting to steamroll low level content, without any need to think or play well.
Generally todays youth dont like challenge or complexity in any form. More often they just want wakamole easy....
I have no problem with the level drop at all. Hell the guy on the twitch stream even said you are still very strong for your level, more so than normal...
edit
if people are going to quit over something so infantile as this, then they were going to quit anyway. This is so minor it really doesn't req more than a single line text...