Well this thread seems to have some very stubborn minds. The idea that Sag and Halo have put out is a good one and very relevant since playability should be important all around the game, yet most of the flack they receive is along the lines of, "You are being selfish because you want to play good and stuff but your idea doesn't benefit the way I play, so there!"
The whole concept isn't about destroying lower levels, it's about making the game playable. If there were a DL reducing potion it likely would be expensive, 1000 nuggets or so, and would likely only reduce the level to 50% between the DL and AL. So to drop from 300 DL at 120 AL would put the DL at 210 for 1000 nuggets, ok, that could be worth it. To lower it again would still cost 1000 nuggets, though the player would only drop to DL 165, they would probably find that to be worth it again. After that the player likely couldn't justify spending another 1000 nuggets so drop 22 levels. The players they could challenge would still be in their skill range. This would likely encourage lower players to buy the potion as well, like a lvl 60 for example who let their DL get out of hand and needs to get below these big guys that just dropped their own DL a whole lot.
Also the argument of levelling up fast? Go for it! Have a blast!..... Oh no, someone is levelling up fast!
Whatever....
The only way I could see this getting abused is by the player with deep pockets who willingly drops thousands of dollars on this game. Those players are buying nuggets and boosting skill points anyway and I'm sure the game creators love it. Actually, is that really abuse? No it isn't, because it was implemented by the game designers to be used as an asset, imagine that. It is just something that frustrates the average joe who has limited funds. One thing that would happen at least is that many average people might put a bit more money into the game than they normally would, which is a whole lot more than if they get frustrated and decide to quit.
Anyone who has played consistently enough to build up a high level player should be afforded some breaks. This concept is hardly different from the potions that reset AP and SP, and those were implemented by Inno without an 80% vote in these forums.
And a bit off topic; Hellstromm, please stop using the term Strawman. A Strawman if a fiction or fallacy and the simple fact that this topic is being discussed means the concern is a reality, to some at least. The truth is that most of the attacks against this idea are the Strawman arguments.