My Edge 510 records grade as I cycle and I find that helpful in planning courses. When I upload my rides, it appears that I can see elevation but not grade. Same thing when I try to plan a course, if I could see grade instead of elevation, would be very helpful. (Maybe it is there as the data certainly seems to be, at least on my rides, so might be just a case of I don't know how to change my view.
I agree this would be nice feature in the web version. The only way to get at this data now is by installing on the computer the Garmin Training Center (TC) Software from the CD. But that means i need to download data in two places now; once for Connect and once for TC to get at all the data. It should all be in Connect.