What are you on about? The idea was never for parity, asymmetry was. In that regard equivalents aren't necessary, the tools to do the job are, which can be different tools. They took the job and that's why they have 7 classes instead of everyone else's 5 precisely because of these limitations, and if you think that they're going to add in an extra couple for launch then you're mental. It's not always going to be a reason, the goal is to add more stuff, but it will always be a limitation on the faction, because it's a lot easier to add in a few new weapons than to design a whole new class with new models, stats and possibly abilities. That's just reality.
Our equivalent of the Lascannons Anti Tanking is prob's a Swoopin Hawks Haywire Grenades. Sure. Nowhere near as long a range but the mobility is insane. It takes a full 10 to take a Rhino (or Pred too?) down but they can be thrown fairly rapidly and disable its movement for any reapers/dragons to take it down. Besides. Getting back to a supply ain't an issue due to the high mobility. Plus you still have an anti infantry weapon which the Lascannon Devastator completely lacks. Id say in the long run Haywire Hawk > Lascannon Devastator.
Technically the chain sword for Scorpions are silent, just saying. They (Devs) decided too give them sound
You just dissed the best class ever by suggesting those crazies should use their weapons... some things just hurt so much more than a knife in the back.