Bruiser yi is broken

The problem with a lot of your reasons is:

• Yi's Damage is not hybrid. Volibear's damage is Hybrid, with a 47.5-42.4-10.2 split. Jax is hybrid, with a 50.9-41.3-7.8 split. But Yi? His split is a 62.5-16.3-21.2 Physical Damage dominated setup. That is a 46.2% difference between his Physical Damage and his Magic Damage. To pretend that AP on hits is a problem on Yi makes little sense.
• Yi's Damage is DPS. Suppose Yi's damage is closer to Volibear's or Jax's splits where the difference between their Physical and Magic Damage is less than 10%. So what? Yi's primary role in the damage triangle is that of a DPS Champion. The stats he's strong at is supposed to naturally counter Tanks. If the main complain that he can do Physical and Magic AND True damage in solid amounts is that he's hard to itemize defensively against, well that's the point. If you compare Yi to any other DPS champ, he has the same weaknesses of being susceptible to Burst and Lockdown but superior strengths against targets that itemize defense. If you're thinking that Hybrid Yi is a problem because he kills tanks too easily, well you just don't have a realistic interpretation of how the numbers of this game are supposed to interact with each other.
• If the problem with Yi's AP interactions is really and only Meditate, then the solution is simply to nerf Meditate, not condemn the entirety of Yi's kit as broken. It can be a simple nerf such as reducing the 15% ratio down to 10%, or making the AP Ratio independent of Meditate's bonus heal the lower Yi is. Easy, simple solutions that at best only justify the "Yi is overpowered/overtuned" arguments but really doesn't have anything at all to do with him breaking the rules of the game.
• Finally, is Bruiser Yi outperforming Glass Cannon Yi because it is unanimously better than Cannon Yi, or because you're sacrificing some of Yi's strengths to cover up a significant weakness? You have to recognize that Rageblade's delayed startup time means that Yi has less Burst potential than Crit Yi (a build variant that, if you go all out, could Crit people for over 1000 damage per auto post resistances at 2.5 AS (this was calculated in S4, I can calculate this again for S6 if you want)). You can not tell me that Yi hyper scales on Attack Speed AND THEN turn around and say that Bruiser Yi really does out damage Glass Cannon Yi due to Attack Speed and DPS's exponential nature. Maybe you can convince me that itemization right now for DPS Bruisers is OP, but you really can't argue that the idea being executed is totally broken. Hell he's not even outperforming every other Jungler in damage, he's only #12 in the list for Damage Dealt compared to all Junglers.

And finally I'd like to point out your Meditate change fixes almost none of the problems you previously mentioned except for the Meditate AP Ratio that I stretched myself to talk about (given you were complaining with his AP Interactions with his offense, not his defense). If you want to promote a more offensive build, you must lower a champion's base offense and (if necessary) raise their scaling. These changes can include:

• Lowering Alpha Strike's base Damage. A half decent Yi player knows this should be a mostly defensive ability in application, no need to overload this ability by letting it do too much damage and have defensive application. This also slows down his clear speed which gives him a much more noticeable weakness as a Farm Jungler.
• Reworking E as not to interact with base AD and/or nerfing Wuju's true damage for a higher AD Ratio. This greatly affects his interaction with Sterak's and helps solve the midgame power spike that Flat True Damage has on a champion who is supposed to be late game.
• Instead of making Highlander a flat Attack Speed boost, make it a Bonus Attack Speed Multiplier (and no, it would still be difficult to make late game Yi too ridiculous since he can already cap at 2.5 attack speed today as it is). We can also reword his Total Movement Speed bonus to something more like Quinn's to make it more obvious to the population that items like Zeal upgrades get you a lot of movement speed with Highlander.