Roach was simply too strong for a one supply unit, it's counterparts in other races all cost 2 supply. The main problem Roach 1 supply was causing is the endgame, where 200 supply zerg could walk over anyone without any problems, thanks to the swarm of 1 supply Roaches as a meatshield.
Roach is cheaper than both Stalker and Marauder, has more HP, higher base attack, and with upgrades is the fastest of the 3. Yes they have slightly slower attack speed and a smaller range, but thanks to burrow they are almost impossible to kill and great for surprise attacks.
MY HYPE LIST: 1) Gran Turismo 5; 2) Civilization V; 3) Starcraft II; 4) The Last Guardian; 5) Metal Gear Solid: Rising







