Personally, I think removing the Like button from the grid is a step backwards.
As a downloader, it was a quick way to check at a glance whether a video had been downloaded or not (since there is no other way, unless you compare the files downloaded to your PC, but that takes time, which you save by using the Like button).
Now, you have to go to a video's page to check whether or not it has already been downloaded, go back to the grid, go to another video's page, check... This is going to be a huge waste of time (what can be done at a glance on the current SLR site may take several minutes on the new one).
