OK so an update with my OPO:
I'd been complaining about the multitouch issues but since turning off the swipe keyboard function on the stock CM keyboard and increasing the delay for holding keys to get symbols, I've been experiencing far less problems and its settled down a bit. Its actually useable. I still can't type anywhere near as quick as I can on the iPhone's screen but it does the job.
Besides this, my findings are:
+ Excellent screen, no yellow banding and autobrightness that actually works properly
+ Battery life is about as good as my Note 3's was, I get a full working-day use out of it with a good few hours of screen-on time.
+ Consistently good camera performance. Not sure it's as good as the iPhone 5S' camera but its pretty damn close
+ 64gb of storage is a nice thing to have, syncing all my Spotify playlists offline is great
+ Excellent all-round performance
- Multitouch bug is present
- Wired headset problems/bugs - when a call comes in I can't talk through the headset if music has been playing (it keeps playing)
- Call quality could be better
- The ridiculous invite system
Overall, if they fix the multitouch bug then I'd have no problem recommending this phone.