Teamfight Tactics has severely limited design space for future champion releases

New champion releases are fun! They add new, cool characters, shake up metagames, and offer brand new experiences for everyone. Unfortunately, each new champion added to TFT, regardless of power level, reduces consistency and throws every single trait off balance.

Let's look at a hypothetical scenario: a few years down the road, Riot releases a fifth ninja champion into League and wants to add it to TFT. Let's name this hypothetical champion Gary. Gary, being an intro level support champion, is added to TFT as a tier 1 champion with the Ninja and Sorcerer traits. Immediately, a few things happen: As a support champion, Gary's ability is a small heal to his allies. This means more draws in the early-game and annoying grindy matches in the lategame. With an extra champion now randomly showing up in your shop, hitting 3 of any level 1 champion becomes harder. Over time, with the release of dozens more champions, getting the champions you need in the early stages of the game can become a pure gamble. Sorcerer teams now find themselves with an extra tier 1 champion to play around with. By picking Gary early on, players can now get the first tier sorcerer buff much earlier in the game. To accommodate, Riot would likely need to completely rebalance the trait, and in turn rebalance the other sorcerers who were indirectly nerfed by the trait nerf. Now, with a fifth ninja, the ninja trait would need a complete overhaul. The buff for having four ninjas is extremely powerful, but is balanced by the fact that only four ninjas are in TFT. With a fifth ninja, and a tier 1 at that, getting 4 ninjas on your side of the field will become significantly easier. Finally, each trait not represented by Gary is now watered down. This makes it a little harder to get a fully developed team of assassins or yordles. While his release was a significant buff to both of his traits, the fact that it was an indirect nerf to every other trait can't be ignored.

Now, what can be done to make alleviate some of these issues? In my opinion, the best option would be creating a monthly (or weekly) rotating roster of TFT champions, making sure each roster contains the ideal amount of champions and a balanced amount representing each trait.

I'm sure the devs have considered this issue; I'm curious what their take is on it, and if they have any plans for the far future of TFT.