Assassins VS ADC's and Supports
It should come to no surprise that Assassin are definitely not meta right now, the Support itemization really messed them up and made their class update virtually useless for most of the champions involved.
An assassins burst is easy to counter now, and that's perfectly fine, the main issue is Support's being able to almost triple their ADC's health bar with massive shields and heals.
Now what really bugs me is that the Support and ADC player's will constantly say "But, it's the supports job to save the ADC, why don't you catch the ADC alone?" and there lies the problem. The point of an assassin is more than just to catch a lone ADC, it's to MAKE the ADC alone, an assassins job is to remove a squishy carry from the fight but how can an assassin remove something if it already removed itself by being alone in the first place.
In addition, many of the Meta ADC's for quite awhile now are really bursty, and any ADC with a lick of sense can easily burst an assassin who's not fed. Here lies another issue, an assassins job isn't to be so far ahead that nothing can do anything to them, that was the entire point of the reworks, to remove this feast or famine issue. And here is another issue, getting fed as a Mid Lane assassin is extraordinarily difficult due to the ranged difference in mid lane. Any mage with a brain will simply auto attack from levels 1-3 and an assassin can't do anything about it.
In terms of fixing this, there are several ways but if riot continues to ignore this issue they'll just end up having to rework the assassins again and to be honest with you i love the reworks design wise because it brought them up to date so i DO NOT want that. It's just that the gap between what an assassin is designed to do and how effective they are at doing it is too great. They need ways of stopping an ADC from getting massive shields and they need ways to stop them from healing their whole health bar. They need ways to survive laning phase without having to rely on a jungler's assistance because it isn't a jungler's job to baby sit a lane. They need ways to stop an ADC from bursting them.