Personally I would much rather Borderlands have a style similar to Diablo 2 in regards to level requirements with the items and then vary the stats of those items but not very the level required to use it. This way you could create low level legendaries that are good for early game and mid game and late game legendaries ultimately at the end.
This would end the major problem of loot being useless in 5 levels or so and the more common games would have their stats adjusted based on the area level of of the area it is dropped in.
I don’t mind Borderlands 2 current system but everytime I make a new character all I keep thinking about with my min/max OCD is just rushing to 72 to begin the “real fun” of actually caring about the guns I want. My hope is for a Borderlands game one day that uses a different system in which legendaries can be at all phases of the game depending on the one you use.
The big advantage of the current system is you can eventually use all legendaries at max level if you so choose and you dont have to worry about lower level legendaries only being good for early game like I described.