We all know that there is no plus to maintaining both a small and large client for the game in this day and age. On the other hand, keeping the small client around creates lots of issues for players who start on it and then upgrade and are confused why they can't access expansion zones. It also creates headaches for CS, and a -huge- slowdown in generating testlive patches.
Just immediately make only the large client available for download. That way, down the line, it will be much easier to transition to only large client compiles for live, there being fewer and fewer active small clients running.