Yeah, this may sound crazy but hear me out.
First, you have to be level 20 to do an Epic in the First place.
Second, you have to have both the item and all the materials to make it epic.
Third, it is naturally "Bound" to the character.
So why make them minimum level 20 to use?
Here's why I ask. I tend to reincarnate my characters, as such I DONT run epic content because frankly I just dont see the reason to if all the gear I wouldn't be able to use until I am once again level 20, at which point I'll TR again.
So... if the ML of "Epic" items were say 1 (ONE) I would be EXTREMELY and GREATLY encouraged to run epics and get the epic gear, because when I re-incarnate I would be able to use that awesome gear I worked so hard for.
Yes, it WOULD be overpowered, but to be honest its not like a 36 PT build with all the past life feats isn't already imbalanced, it would be just one more nice treat to use while leveling through the low levels again.
Its not like there isn't a precedent for it. Just think of all those console games with "New Game+" mode that lets you keep your gear and play through again. TR a character is in effect "New Game+" mode.
Just a thought to encourage others like myself to actually stay 20 for a while and run epics.