SEQ: Preview when dragging start/end of clips!

My request/suggestion for a better sequencer is:

To change the Sequencer (seq) so that when you are adjusting the START of END of a clip in the sequencer, the preview window would TEMPORARILY switch to displaying the FRAME that the adjustment represents.

For example, if i right-click-drag the START of a clip, to change the clips starting point, the preview window would SHOW the frame at the START (or END - whichever is being dragged) WHILE you drag it around. Then when/after you left-click, or press enter to accept the change, the previewer would revert back to displaying the current frame at the play cursor time (where it was before the operation started). As it stands now, adjusting the start and end is guess work while the adjustment is being made.