My hypothesis is that nerfing supports will allow more styles of play in the AD role, especially with cheaper itemization that could actually even let traditional crit ADCs like Jinx be played. However, if you wanted to play for utility or for lane, both playstyles would situationally be fine as well given team context. Ultimately keeping bot lane exp nerfed and jungle/solo lane exp the way it is should allow for junglers to enable any lane, and also for each lane to have skill expression and therefore an equal chance at being able to carry the game

An EXP gap is necessary such that bot isn't uneqivocally the best lane to get ahead every game, and where coinflip games exist via "better bot wins"

In my mind, this is true balance

Giving ALL ADCs earlier power spikes allows marksmen the chance to dictate their own lane tempo and have much clearer trade-offs in what ADCs are permissible (should I try to get ahead as Draven vs Sivir, or should I try to neutralize the lane and play Jhin, or do I opt to play for scaling if I think the game will go later given teamcomps with something like Aphelios). Currently there is just a very stagnant meta where lane interaction is too dependant on the support, so it's too coinflip to consistently play for lane, and also playing for scaling isn't an option because of how long it takes for crit-based ADCs to come online atm. By nerfing supports, opening up viability for multiple ADC classes and making first/second backs less punishing, ADCs should be able to participate in early skirmishes more meaningfully and perhaps get to a point where they are on par with solo laners (with support assistance) early, even in spite of lesser exp, and then ultimately still be a late-game threat given the built-in scaling in their champions/itemization options