Never even noticed how it changed to 4.4.3 on Omni
I'm using OmniROM for most of my devices so updates come pretty much daily and I allow them to go through perhaps once a week.
Wanted to check 4.4.3 availability early last week and only then noticed it had already updated to 4.4.3 on June 10th without a hitch.
Worked perfectly with N10, N7(2012), Galaxy Note 1, Oppo Find 5, but I lost WiFi completely on Nexus 4. Went forth and back a couple of times between 4.4.2 and 4.4.3 (just a cache wipe required) and, yes, WiFi was lost exactly at the 4.4.3 cutover: No big deal with try again later.
On the N10 I haven't noticed a glitch nor much of any difference in terms of performance or battery. But then I tend to have an very minimal set of Google apps and SPB 3D for a launcher, which helps to stay out of trouble.