I wholeheartedly hope that all of the issues will be ironed out, and it will be a top-notch concert.

I sincerely hope all the faults will be eliminated and the concert will be held at the highest level.

I sincerely hope that all the glitches will be hammered out and the concert will proceed as a high-level event.

I sincerely hope all the problems will be settled, and the concert will be performed at the top/highest level.