Making the items mountable means to add hardpoints to a lot of ships. And as Igiss has little time to spare, that would delay the beta for quite a while.
In comparison, adding a few commodities would be much easier.
Team size is something that we need to determine once the different type of matches and events are defined.
Using guard systems would make the race impossible, as the guard ships would kill you while you exit the jump hole.
Starflier race: http://discoverygc.com/forums/index.php?showtopic=4525 <-- that one is doable. I've been able to [barely] complete the circuit before i proposed the event.
(If you find any mistake in my English, please let me know via a PM)
(Really, I speak terrible English, so please, tell me if I make mistakes. I'd like to improve it a bit )