I would say the songs were short because they cut the show from 2 hours to 1 hr. even the comments were cut short. Simon sounded as if he was being rushed at the end for Elliot, just "one-liners".
If there was a problem with the sound system, I'm not sure the public will ever find out about it.
What did I learn tonight? 21st Century music doesn't give these very different artists much to choose from.
You're right. I wish they had made the show 90 minutes instead of just an hour. 2 hours with less people would have been long with a bunch of fluff for filler, but an hour was much too short.