Can't say I've ever used them. I don't play 3025 all that much, and when I do and have a chance to bring an Awesome, I usually go for the peeps. Looking at the -8T though, it looks like it might be fun in a proto-Mauler kind of way.
You know what might be fun? Take a trio of Missile-Awesomes as an early-3050s fire lance, with the fourth mech an imported Raven. Play a game of 'Where the hell are all those missiles coming from!?', and if you do it right, even after finding your Awesomes, your opponent can spend a turn or two looking for the Catapults or Trebuchets you must have stashed somewhere. :)