It isn't magical footwear that requires a nerf, but stopwatch
We all know that getting both Stopwatch AND magical footwear is that makes it so damn powerful.
Stopwatch can be used at 6 minutes while you have to wait at maximum 10 minutes for footwear. Stopwatch is worth 600 gold and those boots about 475 gold (With the 50 gold reduction and 10 extra movespeed blah blah)
Why not just increase stopwatch's starting use at about 8-10 minutes just like those boots?