@Rose Like Kaelin said, a society won't move on from an issue until it is resolved. In this case, the LGBT community won't just stop until they can marry just like everyone else. Now, I now what you're saying by marriage being a loaded term and perhaps civil union may be a better alternative, without that religious connotation or such. But you need to clarify exactly what you want changed about marriage or civil union. It's not so simple as just changing the word, in legal circles marriage and civil union carry a lot of more than just different connotations. The legal benefits of civil unions are very limited compared to what a marriage allows and I think that a few people in this thread already talked about some of those differences, such as, when it comes to married pairings, the ability to plan estates, medical insurance, maintaining a will, and recognition of your pairing with regards to travel, economic, and recognition of the institution across and within international borders.
Changing any of that will be a bureaucratic and political endeavor that will take longer than the "10 years" the LGBT community has taken. The federal government and the state will both have to comply, decide, debate, write, propose (not necessarily in that order) and fight until those benefits are comparable. I mean the U.S. is years behind in repairing its highway infrastructure and that's because of the government. If anything this path to be included and have all the options available like any regular "normal" citizen is probably the quickest. So apart from simply being about the ability to pair with the person that you love, it is also about the economic benefits that traditionally has always been associated with the institution of marriage and denying anyone an economic well-being based simply on sexual orientation, and while I'm at it, race, creed, gender, color, and religion is a denial of a persons civil rights and illegal.
And just because same sex marriage is getting slowly recognized at the state level does not the group should move on. If anything this should be the time to maintain the same momentum going forward. Yes, the country is looking at same-sex marriage favorably but that doesn't mean a thing in the long run. If they are not in the marginalized group they easily forget. The worker's movement, the feminist movement, immigrant movements, the african-american movements have lost or have just about begun to lose the influence they have all fought for, as everyone else takes their what they have accomplished for granted. And undermining the movement as if they over stayed their welcome, or talked it out, hinders any ability to actually set in stone what it takes to resolve these issues and finally move on to other conversations that just as desperately, if not more, need the support. I can think of a few more issues off the top of my head that need resolving but we can't have those conversations, if we don't show that we can resolve another.
You pointed out that you would love to see mental health issues get more of a spotlight, that's great. I'm sure you also know that homosexuality, not that long ago, was once seen as a mental illness, too. This belief is still being held with "reparative therapy" sessions still being held in certain parts of the country. Those therapies are dangerous to those that undergo them and any psychologist should be able to help both the LGBT community and the Psychological Community and at the same the society as whole by doing what they can to show those that still hold these belief towards homosexuality that they are normal people by supporting their inclusion into normal institution without having to change anything that specifically is tailored to them because that will only continue to divide them and separate them from their goal.