As a ninja main, these changes irk me quite a bit. Quick Slash being a powerful option that is on deck from level 1 is very interesting to the meta game surrounding him.
Do I think he needed nerfs: absolutely, but this absolutely guts a huge interesting part of his gameplan. Making it worse without removing it completely would have been a better strategy in my eyes.
Dash back being nerfed even harder is also really a kick in the nuts. Last patch the dash back changes were really felt, and while I felt there that it improved the game, I don't see why it needed to be further knocked down a peg.
Uppercut changes aren't as bad as people think.
Caltrop change was good.
Cowboy getting a DP of his own is a good buff, I honestly think he needed it, though I feel like giving Wizard back his old missile form that was both mobile and hard to punish would be better than giving him one.
1000 cuts losing counterplay is really janky, the move was already kinda crazy if you couldn't make a solid read. Now you can't even set yourself up to counter it.
Overall kind've a headscratcher of a patch. Really feels like you're trying to equalize the win rates rather than looking at how tools are used.