I've been thinking about this thread for the last few weeks.
Half-Step is one of my absolute favorite Jerry tunes. When I put together my dream setlists, there is always a half-step. But.....I have a hard time with it in the opening slot. I like the more random placements that you get with a '73 setlist. I feel like I need to be in the zone for half step. The melodies are very intricate and complex. The section of the song with "upon the Rio-Grande-io" is so delicate and yet so powerful. I feel like I can't fully appreciate the song in the opening slot because my mind and body aren't quite ready for that experience yet, and half the of the house is still getting settled in around you because it's the opening song.
I have similar thoughts about Jack Straw. I remember being at an outdoor ampitheater for one of the early post-Jerry iterations. Maybe it was "The Other Ones" and it was definitely the Mann Music Center. Jack Straw is as great a song as was ever-written and I love it! But I remember thinking it was almost a throw-away because everyone was settling in and it made it hard to stay locked-in. Just the fact that it was daylight made it hard in this case. So.......I love Jack Straw as an indoor opener, but not outside in the daylight. How's that for specifics. Lol.
I think the reason I love Hell In a Bucket so much as an opener is because all I need is my legs and and some energy. It's not complex. It's straightforward and hard-rocking. It does not take focus. If I'm in the mood to dance, nothing can take me away from it no matter what's happening around me. Approximately 5 or 6 years ago I was really close to the front for a DSO show at the Electric Factory. Obviously, the front was already packed when they opened with Hell in a Bucket, so there was no hub-bub around me. Just a bunch of people who were already settled and ready to go. It was my favorite opener of all time at any Dead or DSO show. DSO rocked it so hard.... it was unbelievable.
In the end.....maybe Let the Good Times Roll is the best opener. It's nobody's favorite song. So you don't feel like you got ripped off by them playing one of your favorites before you are ready for it. It's fun and and you can dance a little bit to get warmed-up, while still taking time to light a joint without feeling like you're missing something. So there you go.....every show should start with LTGTR!