bot lane becomes a toxic lane of which team had the better TPs
That's one of the main benefits/consequences of this idea that stays constant with TP in general (IMO bot is already the lane of toxicity).
Say you're Top and you want to gank another lane, you're going to miss out on a lot of cs whether you TP or walk there. The better TP would be either from fountain, maybe, or if you're already on the way there. Either way you put it you're missing out on cs, especially if you fail the gank.
ADCs go into a deep depression because they get camped and denied alot of farm meanwhile their support ditches lane
Maybe its just me, and this is probably bad/dumb, but I think this is how league should be played. If the adc simply can't farm due to the adc soraka with ashe support poking every 2 seconds it may be better to just give up 1st turret (preferably after your team got turret 1st blood) and farm under the 2nd turret while the supp roams helping out other lanes while keeping bot jg warded so the ADC doesn't get gang-banged under turret because the whole enemy team was hiding by blue/red buff (I mostly think this because in the majority of my games after bot turret is lost both bot laners come mid).