Rework the Sandstorm (GDI)
The Sandstorm is a powerful tech unit when its opponent are new players who lack experience. However, as you climb the ranks it becomes nearly obsolete due to being severely outclassed by the Titan and the Mammoth (to some degree). Part of this issue is that the sandstorm was designed to be an anchor, but inherits some characteristics that fit a raider, like a fast attack and decent movement speed. This puts it at a sort of middle ground, where everything the sandstorm can do is done better by another unit. This is reflected in the fact that it sees virtually no play in the higher ranks, and I have not seen a single sandstorm fielded past gold (I'm in masters lll). Some possible fixes to this would be to push back the unlock level so newer players do not feel overwhelmed and to make it a viable late-game raider by buffing the movement speed and allowing it to fire while moving.