Stealth and healing.. Please address them

These are 2 problems that become glaringly obvious if you favor champions that have stealth or healing mechanics. With morellonomicon and the reintroduction of executioner's calling, Champions like Dr. Mundo, Vladimir and Sorraka become a lot less viable. What's the point of playing a champion if their ultimate is cut in power by 50% because 1 person on a 5 man enemy team built an item that was already extremely cost efficient without the grievous wounds.

The stealth mechanic is even more problematic (in my probably biased opinion as a filthy Shaco main). Other champions like Akali, and Teemo are struggling (and Rengar somewhat) as you go higher in the rankings, everyone makes it their priority to buy pink wards and upgrade vision to shut you down. Akali is a free kill with 1 pink ward or oracles sweeper, teemos ult is soft countered by the same mechanic, and shaco and rengar are sitting ducks if caught out before making it to their target in stealth.

I'm sure this is very common knowledge to most of you, and I'm sure it's been brought up before, but it's a big problem for the few of us stubborn enough to want to main champions that use these mechanics.

I often hear riot developers, analysts, etc. talking about how "there is no counter play" to an ability, champion, or strategy; but should "hard counter" play be available to every champion in the game via an item that costs 100g and you can have 2 of at a time or a trinket that doesn't even take up an item slot? What's my counter play to that? Don't fight? Split push? Bank on the enemy not buying pink wards? The counter play to shaco is peels, exhaust, and burst damage/cc.

I had a game the other day where I was left with support and there was a Rengar on the enemy team, and being that he is very similar to shaco just having more offensive utility than defensive, I picked Allistar, and it worked beautifully. Head butt him away when he jumps your carries, easy. Most supports can peel just as easily and stop bruisers and less mobile assassins in their tracks (Janna comes to mind). But for some reason riot thinks it's necessary to leave these champions gimped, and their kits easily countered, while they buff AD carries...

There's really no counter argument that is valid that I can think of for why these issues are still relevant. I understand playing around pink wards and such; and that these champions, although extremely easy to counter are still to some degree playable, but stealth and healing are still very key parts of a hand full of champion's kits.

My 2 cents: Pink wards are for vision control, and denying vision, as they are in most games without a stealther, so remove their ability to see champions. Ward deep vs shacos, his stealth lasts 3 seconds. Rengar gives u a giant exclamation point that he's near you, and Akali is in a small circle. Teemo's mushrooms are essentially 1 of his 2 abilities, and have received several damage nerfs. Remove or reduce grievous wounds to ~20%, and/or put them on a longer active use cool down. Just realized I forgot twitch. Eve has her snare break move speed and a huge shield so I don't think she suffers nearly as much.