Goal to increase diversity in bot occurred initially but has now reverted back to ADCS 100% of the time. Failure.
Vel'Koz has already been played on the Worlds Play In with a win, and Heimerding has been banned 9 times for his botlane strenght considering that on pro play he's only viable bot (thank you mr G2 Hjarnan)
Of course that non adc botlanes are less popular now, you needed some adcs at 45% winrate and being non viable in any lane to have champs that already had a lane be good on bot aswell.
Failed to make all ADCs viable, just switched out what the 'op' ADCs are.
Was that even one of their objectives? Because it made no sense if they also wanted non adc botlanes. But yeah, they didn't made this point.
Goal to reduce early power spike by ADC's is a failure due to Stormrazor
With the base stats nerfs every adc has a worse lane fase on top of the FleetF nerf, and StormR gives them a earlier power spike by the cost of being a obsolete item later that literally any adc outside Jhin sells.
Goal to reduce ADC damage to squishes is a massive failure. ADC's like Jhin, Kai'sa and MF still 2-3 shotting squishy champions.
Jhin and MF does this for their kits, DarkHarvest MF with lethality isn't caused by the adc's changes, and Jhin always had his dmg burst for how his aa are (but now with the 600ms that is full bs, but that's movement speed, not more burst dmg and they are already nerfing it). And Kai'Sa sure is a problem.
Goal to increase cost of ADCs items occurred initially and then Riot decided to basically reduce them back to their previous super low values as a buff.
Because they changed their goal, they realized that making a wholes class ultra lategame with trash early-mid was a bad idea so they reduced the cost but also nerfing the lategame power. And dont forget that Zeal items are still worse than on pre 8.11 and that Inifinity Edge now gives 10% true dmg convert which makes this IE version the worst version we have seen and the one that gives less dmg, compared to the old +50% crit dmg or the 15% true dmg convert.
Introduced a bunch of broken items that are abused by non ADCs
ER rework was a total failure that is niche on his best user that is Lucian, they failed miserably right there. And StormR being abused by assasins is like adcs abusing lethality, it just needs some tweaks.