Granted the Arranger concept sounds easy.
I accomplish essentially the same thing in every song I work on in Sonar Platinum with a bit of extra effort.
0. I start with a starting file where this is already set up for the most part.
1. I use Markers. Enough said, everyone gets that they help mark and navigate and more.
2. My top track in each of my songs is a MIDI track. I put a measure of 4 hi hat notes in there just to give the track a clip with data. I then copy and Paste several more of those clips on that track. I set the background color of each to a different color.
3. I record tracks for the song. When I know what set of measures is verse 1, I drag one of the clips on the first track for that span. Similar for other sections. This ends up looking like your Arranger line in the screenshot above. In Sonar, instead of a dedicated program display line, I'm using a track with colored clips. I use the Clip text edit to put the words in the clips so they say Verse 1, Chorus 1, etc.
4. Moving sections of a song from one place to another, or duplicating sections, has always been fairly easy in Sonar. Different approaches exist to accomplish that actually. I happen to use the Select By Time choice under the Edit menu. This allows me to grab a block of any of the song, and to cut it, move it, etc.
I don't feel like I'm lacking an Arranger capability in Sonar since I do this. But I agree it's not a built-in, any new user knows how to do this, feature.