I reckon the weapons are balanced quite well (apart from the fact I can't use the sniper rifles). The active camo is fun, but only good in the hands of a decent player.
No weapons get overly whored, and thanks to every private wanting to try out the vehicles taking out tanks/mechs with the static AV guns is so simple a child could do it.
It's actually quite balanced. As said above, the cloak device can be good if a skilled player is using it. The infantry to vehicle balance is also good.
Personally, I <3 the guns on the underside of the titan.