Are you sure it still works the way you described? I just:
1. Created a MIDI track.
2. Put five MIDI clips in the track at 10-measure intervals.
3. Placed the Now time toward the beginning, in the middle of the first clip.
Whenever I double-clicked on any of the clips at the 10-measure intervals, leaving the Now time toward the beginning, the clip would open up the PRV and the clip would be centered in the middle of the PRV. Nor do you need to keep the PRV open for this behavior; if you close it, the clip will still open up on the middle of the PRV as it opens.
Isn't this the behavior you want? Is there some other condition needed (other than how I tested it, as described above) to produce the results you describe?