"Adc can 1v5 after bork"
Hyperbole, but depending on the comp and specific champion it can be true. A vayne wth botrk by 7 minutes can 1v5 pretty easy. especially if the enemy comp has no tanks.
"Junglers doesnt control the pace of the game anymore"
They dont. The pace of the game is focused on the botlane and marksman, which is why the meta has evolved into a perpetual "protect the carry" comp and why marksman have access to the highest damage reduction in the game.
"Draven is broken so Zac is balanced"
Draven is broken because, due to itemization, hes become a low-skill floor, immortal snowballer with no counterplay except for disengage and anti-snowball botlanes. Zac is annoying asf though.
"Triple lifesteal item adc is viable"
. Yeah, its viable. IE/zerkers/hurricane is the marksman core for a reason.
"Adc themselves are safer than mage"
Depends on the marksman. Most marksman are actually more mobile than non-assassin/diver mages AND contain some form of CC. The mobility combined with their itemization combined with their CC is what makes them safer than standard mages.
Marksman, with their current itemization, have a higher burst than SYNDRA with 700AP. Burst in this sense is the damage i put out with a 100% crit build in three seconds (the amount of time it takes most mages to unload their entire rotation due to cast times. Not every champion is like ahri or riven and doesnt have cast times).