The garbage ADC changes only buffs were upping the crit from 10 to 20%, and replacing AP with CDR (which is arguable, depending on champion). Meanwhile, nerfing the AS from 30 to 15%, the AD from 30 to 25, MS from 8 to 5%, and upping the mana as another excuse to increase price by 100 despite losing so much for so many champions.
So they're removing the 20% crit that nobody acknowledged, since it was better back when it had 10% crit, which was too RNG to really utilize well.
They're increasing the CDR, which is always good, considering spellblade procs.
And they're buffing the AS by a massive 25%.
Building it is also far easier, since the least desirable component is now CDR+ 35% Attack speed, which suits you far better than 15% AS+20% crit. The MS might be missed, but it wasn't really needed in the large majority of cases before TF was finished anyway. We get to keep the 5% despite Zeal no longer being a part of Trinity Force.
And the price is going slightly down.
I think its a pretty huge buff, especially since it significantly improves her extended trading power. 1 or more extra attacks is more consistent than hoping for a crit among 5 hits. Plus, its very easy to hit 40% CDR on her with the new changes, which makes her insanely sticky and powerful if she's not focused down.