The same tools are given to all players. The effective use of the tools will vary from player to player, which is many times confused with "unbalance".
The higher powers forbid us all for playing a multi player open world without playing with other players... Yes it is intended that you go multi player. That is the whole concept of a multi player game. To play with buddies and against.
Sure, but somehow I doubt, that traders will be able to participate in a useful way... Trading is a pretty boring activity for most players, and escorting a trading ship even more so. Both will get less profit... the Escort could make more by just doing the trade run himself and the trader loses what he has to pay for his escort, so to be realistic, traders will usually have to fly without escort, simply because there are not enough players willing to escort them for an accaptable payment.
Logical solution: Trade in solo. There will possibly not be too many traders left in open for the pirate wings to prey on, if there is no balancing factor on the traders' side.
But I guess we'll have to wait and see how this is going to work out, before we can judge it.