Subdivisions has never really been a standard. It has been played a lot lately, but was skipped on quite a few tours (CP tour, 2nd leg of the TFE tour, VT tour, etc.).
Personally, I think Tom Sawyer, The Spirit of Radio and Freewill should always be played, but I wouldn't fret if Limelight and YYZ were given a rest for a while. Hell, they could play Red Barchetta (which is the best song on MP anyway) and still get in enough of Moving Pictures to keep the casual fans fat and sassy. And maybe bring back In the Mood (which is short and sweet, not to mention easy to play and easy for Geddy to sing), another popular tune that the casual fans would go crazy over. See, they could lose Limelight, YYZ and Subdivisions, but still play Tom Sawyer, The Spirit of Radio, Closer to the Heart, 2112, Red Barchetta, In the Mood and Freewill...more than enough "standards" to keep the casual fan happy.