look also here
http://bote-forum.square7.ch/wiki/index ... e_Union.29 to see the advantages and disadvantages of Heyoun and the other races (additionally I tried to create a table at the end there - it's atm at minor length)
As can be seen all races have there own advantages and disadvantages
but Ayrik you're right: All races must be kept in check before they get to big - that's a challenge. Solve it with getting your own empire the biggest + strongest one