Can we get a new champ that

Mechanically...

No...

His mechanics are Q E auto attack.

Mechanical skill would involve complex combo's which you have to land in order to play properly, such as 's newest rework. Master Yi requires good playmaking to be successful. You can't just charge in and 1v5, but not mechanical skill.

Mechanics and play-making are two different things. Mechanically, is far easier to play than or , as they both have skill-shots and he does not. However, must know when to go in, and there is quite a bit of timing that goes into using your q properly, not to mention knowing when to W tank an enemy vs when to run, and when to activate your E. In this way, requires more judgment than , (Although arguably I would still say that has to make more play-making decisions than )

All that said, none of these champions are mechanically intensive. Mechanically intensive champions are champions like , , , , , , , ETC. Who rely on quick button presses or micromanagement to achieve their goal.

While Master Yi has a higher skill ceiling than people give credit for, the same applies to Janna and Soraka. While it's easy to be useful on these 2 supports (just shield/heal), it's hard to actually play them perfectly during teamfights. With 4-5 active items, you have a lot of buttons that you need to be able to tap instantly when required, especially kind of becomes a 2nd ulti.

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Ever use alpha strike to avoid a Syndra Q>E and an Alistar headbutt? It's possible, and I've done it (though I'm not good enough to do it reliably).

You can also use it in duels to do things like blunt the burst of Zed's death mark while also resetting your auto attack timer. The healing portion of it is whatever.

Ever orb-walk with 2.5 attack speed?

You're right, you don't necessarily need high mechanical skill to play Yi. Because he has a low skill floor.

His mechanical skill cap on the other hand is pretty high. Not the highest, but much higher than most champions.

That he also requires game knowledge and quick-thinking (which goes hand in hand with mechanics, you need to be able to analyze a situation quickly and react accordingly, few champions require such quick action) more than proves he is a high skill cap champ.

But don't take my word for it. If you want a source who might be considered more credible the analyst of CLG agrees with me.

https://www.reddit.com/r/leagueoflegends/comments/4gzoig/clg_analyst_mr_mandalcios_exhaustive_revision_of/

100% agree with you and Mr. Mandalcio. (It's good to see someone else using his analysis!) Those three things that RogueWill highlighted are hard, despite his casual mentioning of them. Master Yi gets blown up in teamfights extremely quickly, and he needs to be able to use his Alpha Strike at the correct time to dodge the most potent spells. Using Meditate is an even harder skill to use, because it's so versatile. Its most basic use is healing, but the fact that it's an auto-attack reset AND a potential damage shield makes it ridiculously hard to optimally use. One of the most satisfying things you can pull off as Master Yi is using a split-second Meditate to block an attack/spell and then getting off an instant counter auto-attack. That's really difficult to do, but it defines duels and it was accounted for in his power budget. He's a great example of a fun champion that's easy to learn, then keep learning for a long time. Master Yi's skillcap is not nearly as low as most people think.

The reason why we get so few of these nowadays is probably because it's really hard to make a simple kit balanced and satisfied. The more complex a kit is, the more levers there are to pull when you want to balance. More complex kits often feel more satisfying for those who play the champion because they feel like there are more things they can do.