I think the gear list is pretty good. You will be lighter than 90% of starting hikers.
Some of the UL gear isnt as robust or idiot-proof as conventional. It obviously works for many, but there are some that just arent willing to accept the tradeoffs and revert to heavier gear. As long as you understand the tradeoffs, and accept them, everything is OK.
The hexamid isnt as weather proof as a 3 season double wall tent. When its windy and rainy all night you might sleep snug like a rock in a tent,lulled to sleep by the rain. But might be a little worried and spend some time avoiding spray under the hex. Just an example. I use my hexamid most of the time due to the light weight, but have spent restless time worried about getting wet in it during storms. Site selection, orientation, pitch height all can become important. I agree, its a great idea to get some experience with the items first.
You will probably want a summer bag at some point. When night temps reach about 55-60, with humidity, it will be too cold not to cover up, and too hot to cover up even partially with a 20-30 degree bag, particularly when you go to bed. It gets frustrating unless you have a light bag.