Jan - 180 whilst remaining VMC - yes. However, I was involved in a simulator study a while ago with a variety of PPLs and commercial pilots who we put in various unexpected situations in a sim. When we introduced an inadvertent flight into cloud, over 50% of the PPLs who tried to do a 180 out of it lost control and ended up in a stall/spin. Any pilot, of any experience level, who kept the wings level and either climbed, descended or flew through it survived the experience.
IO540 - I agree about the avionics, I'm not sure I agree about the early solo. It's both an excellent motivator, and brings us all over a step into much greater confidence in our own abilities. Plus learning to fly is supposed to be FUN, and I certainly remember the huge grin on my face after mine (which lasted at-least an hour until it had made me late picking my then-girlfriend up from work and she made her views on that abundantly clear
).
Unusual attitudes - I definitely forgot that one. Somewhere pre-solo, and then inclusion as another emergencies as those are practiced and practiced perhaps? Should be, I'd argue, integrated into everything else - as should emergencies, rather than treated as a discrete exercise.
Sunday - I've twice had to land with a U/S ASI, so definitely would include that in emergencies. Good point!
G