Small patch, huge changes.
Snipe nerf its hard to say, it feels too big numerically (6>10 against BLs), but snipe vs. zerg was the last thing left in the game that was just flatout broken. Its going to have a huge impact on a lot of terrans playstyles. The Mule on gold nerf is kind've meh, good but not that big a deal.
That phoenix change is too big, mutas were only barely able to get shots off as is when phoenixes gave chase and the mutas attacked before the phoenixes could turn around (slow acceleration). With two extra range it seems to me it will be stupidly easy to kite the mutas endlessly and give chase without fear of the mutas been able to turn around and hit the phoenixes, since you no longer have to get the phoenixes up close to the mutas to begin with.
I'd rather them test 5 range phoenixes, no upgrade, and see if thats enough against mutas and whether it helps opening phoenix in PvT be more viable (because its fun to play and watch others play phoenix vs. terran).