A few years ago, riot decided to reveal jungle buff timers and do away with the need to track their timers. The reasoning for this was to keep players playing against each other instead of against the game itself. Why isn't this same logic applied to summoner spells? Players track summoner spells the same way they tracked jungle buffs, and there's a similar burden in tracking them via chat. When an enemy uses a summoner in your vision, why not add the timer to the scoreboard?

I’m not personally convinced that all timers should be shown in the game, and would instead argue that timers should be evaluated on an individual basis. Jungle timers, when present to the entire team, have routinely increased conflict and lead to better play. This came at the cost of reducing some of the skill difference the game could reward by giving all junglers information about the jungle respawns.

League has a delicate balance to maintain. It is both a deep strategic game, and an exciting tactical game. There are players that very much prefer either side of the game, and it’s important that the game has ways that players can excel with a focus on either of these skill sets.

For summoners specifically, giving out the exact timers gives out a lot more information than most other timers. Summoner cooldowns vary a lot more from summoner to summoner, and are affected by items and runes. There’s a lot of knowledge tests that we undercut by giving exact timings, and some of the power of the content that changes those timings is the ability to sneakily change the tempo of a champion’s summoner usage. I’d argue that it’s much less clear that exposing exact timings would be beneficial to the game.