I prefer daylight savings all the time but actually I would go for utc and regions just get used to times being when they are and schedule around daylight.
The issue with just using UTC is that the date changes in the middle of the day. Like in Seattle it would change from one day to the next at what is currently 4 PM.
You try to plan an event for the 16th, and which physical day it's in depends on whether it's before or after an (ultimately arbitrary) cutoff time. You say "oh this happened yesterday" well was it a few hours ago before the date change or do you mean the previous physical day.
Also weekdays would be messed up. You work "Monday to Friday" between the current 9 AM and 5 PM, but then how does that work when Monday starts at (what's currently) 4 PM? Do you work between 4 and 5 since it's during work hours on a Monday? And on Fridays do you stop working at 4 because after that it becomes Saturday? You say you're busy all day Wednesday, but does that mean you're suddenly available after 4 PM when the date changes?
I don't see these as issue. you work 9-5 because of the way we do it now. I worked a second shift job that started 5pm and went till 1:30am the next day. it was not confusing at all. It only got fucked up when we had the time change for daylight savings and back. Day would change over at 6pm for me but you know I have been up past midnight and even out of the house and I don't get all kurfluffled because the date changed while I was awake.