Champion Select Improvement: Why and Why Not

Hello fellow summoners players and hopefully Rioters.

First, and TL;DR, - I have seen ideas to improve the Champion Select screen, but not Rioters' posts or efforts for those (I suspect Rioters are doing something and I just haven't seen them). I wonder if they are actually doing something on this problem, and if so, how/when it will be solved.

The Problem we have can usually be summarized into "We have no in-client way of finding a list of champions for certain picking situations". The only valid solution I know is "Make a list of your picks on a sheet of paper", which no-one so far seems to like (even I, myself, the very person to post this "solution" on a thread). The others are "Lists for 6 attributes is enough if used wisely" and "Just remember". ...I think many of you can get what I feel about them. or just go and find Junglers to meet your team's demands. As for me, I just want the Search Box (which we already have) to "keep the champions who meet my demands" and "drop them who don't".

The Solutions, as for them, I know three. Two have been actually posted, and one is just in my head. The in-game item shop already has something like each of them, so I don't think I have to illustrate them with pictures. Players should be able to customize the Champion Select improvement, since they all have different champion pools.

• Tabs are good, the easiest solution for most of players. "Just listing up champions you can play for each position" is quite simple, but really useful. I don't think too many players have champion pools with 20+ champions per position, for whom this solution might not be enough.
• Search Box is the easiest to implement, just because... we already have one. This solution would probably require the least coding efforts of the three, and it won't cause a clutter in the Champion Select screen (it would look identical to current one). Also, it can support the largest number of "search terms" - each position, each role, each city state, each champion to counter, etc. But it would be the hardest to handle for players.
• Check Boxes is never seen to be posted. It's something between the two above, and helps players with huge champion pools (let's say, 30+ for one position?). But it can cause the biggest clutter (leave the smallest room to actually show champions' icons).

Why Not then, when we have The Problem and The Solutions? I'm not here without ideas about that (I haven't seen a Rioter's post though). Riot has limited resources, and not everyone desires this feature so badly (for example, the Jungle Timer frustrated some people). But what I think is the biggest reason, is the fact that they have three options with different Pros and Cons. If there were only one, they might have done that already... But seriously, I cannot think of a reason not to do this at all.

Without a Rioter's post, it's nothing but a wild guess. I hope to hear Rioters and summoners players' thoughts.
Sorry for the wall of text and possibly bad English (not my first language). Thanks for reading!