I only partly agree, Frogboy.
Yes, the game should be enjoyable for all players, including the SP and casual gamers.
But Sins does not even offer a SP campaign and it was shipped with a horrible AI so the focus
obviously was not on SP. Using SP now as reason to not fix MP balance issues is ... strange.
Yes, the AI update probably helped there (didn't make a 1.03 game yet) but it doesn't change the basic fact that Sins is all about MP.
But lets look at the most successful strategy game ever - StarCraft. It was been optimized for competitive play and it has done way beyond great in that matter. Still, having a well balanced game
is fun for the casual gamers.
Those casual gamers probably won't notice possible imbalance but they also won't complain if they get a perfectly balanced game. That's the beauty of it: In a balanced game, everybody is happy.
About the noise-filtering: There you are absolutely right. The whining on this board is quite ridiculous and people attitude is often very annoying. But I do not see the huge problem with the filtering process. It's quite obvious who seriously knows what he is doing in the game and who isn't. If all else fails, just look up peoples stats on ICO

Or just write PMs to the good people asking for advice. You can work with the heads of the major Sins clans, they should know about game balance. And you can always use your own brain

Obviously something that does 20 DPS and has 2000 HP should cost more then something with 10 DPS and 200 HP. Something that has 200 HP and 6000 range should do a little less damage then something with 200 HP and 2000 range. Or the same damage and therefor less HP.
I for example am sure no professional gamer and I'd probably lose 1v1 vs anybody on these boards who knows a little of what he is doing. Still I'd say that I understood the basic problem with LRM / Illuminator spam and why Illuminators are useless early game (and therefor Advent way too weak) but very powerful later. As casual gamer I can say that the recent LRM change didn't make anything better since the core problem (LRM being the by far most versatile unit in the game and Advent LRM being weak in direct comparison with the others in early game) remains unchanged, as a casual gamer I can say that the black market changes don't improve anything, as casual player I can say that there are quite a few completely useless techs that should get an update or even a replacement and most importantly, as a casual gamer I'm very interested in a balanced game.