XDJ-RX Beat Grid expand and contract with tempo changes

I have noticed that when I have 2 tracks loaded of different tempos if I change the tempo of one to match the other the graphical representation of the track I'm changing the tempo of doesn't change. It would be very handy if it did as would visually aid syncing the two tracks together. I can see that at the crossline in the middle of the display the alignment of the grids lets me see which track is in front of the other but I would have thought that if I sped track two up, the gridlines for that track would move closer together (contract) and if I slow the same track down the gridlines would expand. Would this be just too demanding on the prcessor or is it possible to do this?