Request - Ability to make groups of champions for champ select

I am writing this as a feature request and hope this is the right place.

Riot, a good feature for you to add to the client would be custom groups for the champ select window. The idea behind this would be to allow people to easily see a group of champs for whatever match/position they are in. For people like me who own all champs, trying to pick an appropriate champ while skimming through the whole list can be a pain and makes it easy to forget someone who may have been better.

Example: User is in a draft match for SR. Through whatever means, they are given the role of top. They don't play top often, but they are familiar with champs that work there. The user could select a drop down built into the champions label and select a previously created list of their preferred top champs.

I would find this very helpful as there are alot of champs I like, but also forget about cause they are not a main of mine. Plus, there are alot of champs that I really don't need to see cause I don't like them or suck with them. I mostly want this for ranked, but people could use it anywhere.

Good idea? Refinement ideas?