I mean, what's the problem?
Even if it's done as a response to the Ellie Fiasco i don't really get what's the point or why anyone would care?
And it's expanded universe stuff, some people just really like learning more about a setting or characters, you know, like Star Wars and many other franchises have, it's just some extra information about the setting and one character.
And even if it wasn't...it's their game, they are the ones who designed everything from the start, if they want Soldier:76 to be gay...well, they can, it doesn't seem like it even contradicts anything revealed before on short stories, comics, small movies and etc that Blizzard has done before.
I'm sorry, i just really don't get what's the problem, i genuinely don't, even the idea of this being a response to the Ellie Fiasco doesn't make me feel anything different, it's just one character being gay, something a lot of people won't know or care about.