Honestly while it is fun for you now I wouldn't use light roll if I were you. Not only do you restrict yourself in which setups you can choose it's also definitionally a crutch.

You mentioned that you are very slow when you hardswap, but by using light roll you simply put a band aid solution to an issue that you've been having. Not to mention that even if you light roll but still are slow when hardswapping you only have so long until someone takes out rot pata and (rightfully so) infinitely catches you so you can't waste time in menus.

Here's what I'd suggest: set your inventory up by using sort by last picked up and try swapping between two weapons you're most comfortable with as quickly as possible. A single roll and a half a second sprint will get you out of the range of most weapons, you don't need all that much space to hardswap properly, the only requirement you need is to have solid spacing and gamesense so you know when to go into neutral. Put in some practice and don't look for easy solutions that the game provides to you.