Ok, no more secrets left (outside of specific device availability), so here are my biggest disappointments with Apollo:
-Worse sync experience. I remember one of the things I hated about Android was the lack of a good PC sync experience. I even downloaded 3rd party software to mimic the experience, and now WP8 takes a step backward by adding a new crappy sync software. Call me old school, but I prefer to manage my collection, podcasts, playlists, etc. on the PC and then sync it to the phone. I guess I can technically still manage my collection through Zune, but then I still have to work through that crap new sync client. I don't know how the sync client manages podcasts, specifically video podcasts, and removing them when you're done with it.
-Lack of a no-compromises hero device. The Lumia 920 is the closest thing, but its fat, heavy, and doesn't seem to have knockout daylight photo capabilities to match its incredible low-light performance. No SD slot sucks too, I've been saving a 32gb card for Apollo phones.
-No new stand-out software feature. Kids Corner is nice, so is rooms. Data sense is useful. But I wish there was a feature that stood out as much as hubs and live tiles stood out when I first saw Windows Phone.
-Tell Me was not significantly improved. With Siri and Google Now on the market, Tell Me seems significantly underwhelming. Now, I don't want to go around in a crowd talking to my phone, but I use tell me every single day in my car for texts. It's inaccurate, it doesn't do natural language, and it lacks functionality. Apollo barely improves it, and its a very important feature for me. I would like to tell it to start playing a specific podcast, to tell me the weather forecast, to play a specific playlist, to set a reminder, a calendar appointment, etc. while I'm on my commute.