The most common objection I see is people saying they wouldn't waste their gears on the risk for no extra stat.
My response to this is simple. Nobody is forcing you to refine for a higher level. All this would do is allow people who WANT to do it to do it, and for us to not have to ban people who do decide to go for this.
As it stands right now adding sigils would not work because you could use those sigils to refine +13 - +14, for example.
There is an item that temporarily changes an items look to +15. I haven't done much experimenting with this item. Can't even remember the name right now.
I also have some ideas to try other things that may work for adding sigils or whatever. The only way to have a sigil that would do it, so far anyways, would be a manual change item like gear change in the banana shop. Probably for like 200 bananas or so.
The poll is to gauge peoples opinions on if it was possible, would they be interested. I never said anything about how it would be done, nor did I say it would be done before Regenesis. The majority of the comments here are based on incorrect assumptions. Cascade, Monkey's Luck, and WHATEVER other method is made available. You should read the whole post before responding.