They have gone way too far on the patch. I'm not completely against meta shifts even though the meta sucks for me. However, playing a crit adc that can't really build blade is like saying you aren't allowed to play the game until late game. There was about a 900 gold increase in cost for a weaker power spike. Then you add in the fact that crit build components are garbage right now besides stormrazor and you have crit adcs being unable to play the early-mid game. They even nerfed hp regen and other early game stats (buffed hp) so poke sticks. Fleet also got nerfed, especially with crit. One of the nerfs was fine, but all of them completely dumpstered crit adcs.
Some people will say that mages and other things being played at bottom lane is a good thing but it honestly just shows that adcs are just simply too weak early game right now. Their sustain was possibly too strong but they needed it for how strong supports were (seriously, janna w and stuff feel like huge explosions being thrown out). That being said, I'm not completely against the fact that mages can be played bot lane but adcs should be able to still be ok into them. It currently feels like you can only play crit adcs like jinx/Caitlyn into tanks (IE true dmg with last whisper armor pen is stupid).
If mages are allowed to got bottom lane, then I believe crit adcs should be allowed to mid lane or maybe top/jg (fits more mid lane role though). However, the issue is they lack cc or mobility to be viable vs assassins. I've seen jhin mid but idk if it's good since I never won with one so I might be a bit biased. Tristana mid can work but Caitlyn/jinx mid are just simply not good, especially jinx. Ashe mid isn't very good either besides against some mages. Basically, assassins are the top counters to adcs and they were about half the mid lane pool (assassins/mages).