It’s not easy at all. Remasters are possibly on a current generation console, but this game is two generations behind. It would require an entire rebuild and customization alone for it. Considering they just started production for BL3 it is very unlikely they will have the necessary resources to implement such a project.
Maybe if gearbox had more help they could expend developers to such a project, but I doubt they have the employees for that while trying to focus on the future of new games and new ideas. We all love this game, but I just don’t think it needs a remake. It’s already a good game. It wouldn’t hurt for them to finally fix all the broken mechanics and gear in the game though, but then you run into the issue of pushing patches for Xbox and PlayStation which I think cost money.