I agree. iOS 8/iCloud has been extremely sloppy lately, but I've gotta admit, I'm very impressed by Yosemite. It works very smoothly and seems to hold up better under pressure than Mavericks. I'll have to wait until it's officially released and see how it goes when using it on a daily basis, but so far, I'm definitely impressed.
I kind of feel like this happens every year. One year, OS X is great, but iOS sucks. The next year, OS X sucks, but iOS is great. Based on that pattern, here's what I see:
2011 - OS X Lion, bad (sloppy, very buggy, many issues); iOS 5, good (new iCloud, new iMessage, very smooth and refined)
2012 - OS X Mountain Lion, good (refined over Lion, almost zero x.0 showstopper bugs, faster and overall better, more integration with iCloud apps); iOS 6, bad (Maps, x.0 release bugs, issues with WiFi on day of launch)
2013 - OS X Mavericks, bad (general bugs, SMB/Mail issues, TM issues, battery issues, etc); iOS 7, good (mainly UI changes were what caused complaints, but the underlying software itself was still good)
2014 - OS X Yosemite = ? (if it stays as good as it is now in PB3/DP8, hopefully Apple won't botch it up, then it'll be good); iOS 8, bad (no need to explain)
2015 - based on the pattern established above, maybe OS X Mojave/Napa/whatever it'll be called will be bad with sloppy bugs, while iOS 9 will be much more smoother and refined)
What do you think?