I really don't think anything lgbt related is relevant to this discussion. At all.

Furthermore, I don't see viera to be very romantic, at least not the ones in the wood. To me, any relationship is for the sole purpose of procreation. Other than that, I can't imagine they would have a romantic love life.

If we're talking about viera who decided to leave the wood for good, then I'm not sure. Viera seem like a cold and distant race, and their hearts are rarely won over, if ever. I'm using Fran as an example, but maybe not all viera who leave the wood are this stoic?