There is an offset to the number of female companions, in that 2 out of 3 advisors are female. So leaving out the Inquisitor, the Inquisition inner circle comprises 7 males and 5 females. Both Morrigan and Leliana are involved with the story and the latter does almost become an extra party member in the demo we have seen.
On the whole, most of the male characters have story reasons for being that gender. Cole was already a character in Asunder, Varric was returning from DA2, Dorian suffers in his home culture from being gay, Iron Bull was assigned to his role by the Qun (who have specific ideas about which gender is suitable for each job). If Solas wasn't male, then there would be no male elf companion character. That leaves Blackwall. May be he could have been female - we won't know until he tells us his history.
I must admit that I'm more disappointed about representation among the races. With the exception of Sera, all the female companions and advisors are human. The majority of romances that we currently know of for either gender are also human.