Here's what I have thought about, but feel free to add more.
The ability to select positions pre-match.
A priority of 1-5 would be ideal, like Smite does it. It reduces lobby time for everyone and makes things more fair than splitting the odds with whoever else is hovering the role you want, plus it remove the issue of getting a 3rd or other role when splitting chances with teammates. E.g. if someone hovers mid, why are you risking getting assigned support when hovering mid, if solo is your 2nd priority? This should ideally also future balancing and protection, so if you didn't get your role, your chances go up, or if you get your 3rd+ priority, you are guaranteed your 1st or 2nd priority. If the player count can't support that, still having a 1-5 priority is way better than what is present now.
Map overview
It is horrible that you can't track timers properly if a ward is placed on an objective, or someone is near it. Put the timers in the tab-menu as a minimum, but making opacity layering so you can see it, or having the timer beside the objective on the map would do wonders. It would be nice to have for all jungle camps, really. Timer on teleporter and inhibitors, too, please. It is simple accessibility. High rank players will keep track of them, and everyone else just loses off of it, so why not just make it nicer and fair for all?