Just a note for non-watchers .. Leno's show is scheduled for 11:35 to 12:35 (EST).  I usually only watch/record the music slot and the time allowed was standard .. as was the quick ending - a leisurely exit seems to be the exception not the rule. Also keep in mind the show is filmed before an audience but not broadcast live .. any needed adjustments can be done in editing. 

Wanted to get reactions from some folks who aren't invested fans before I posted.   
General consensus, after filtering the harsher comments, agreed with the person who said there was just too much 'going on' (groan) . .  a great song was muddied and lost.  
Grace got a pass from everyone - one comment was that she seemed to be the only one who showed up for the rehearsal - if there even was one - and if there was, Ricky Minor has to take the fall for the result.  
I pretty much agree with all their points.