Yes we are in a new 300 million dollar arena, but its going to take the ice crew guys a little while to see how concerts/weather affects the ice sheet when its covered and not covered, etc. etc.
Its not simply they make the ice and they let it sit, they are constantly adjusting the temperature of the cooling pipers underneath the ice to keep the ice at the perfect temp. They could have easily not had it cold enough to account for the humidity from the concert, add into the fact the equipment is new, everything takes sometime to get used to.
I have no doubt that we will have some great ice once all the kinks get worked out and the guys learn the subtle nuances of the ice in the new building.