Shouldn't latex.stackexchange.com redirect to tex.stackexchange.com?
Even the title of the page says 'TeX - LaTeX - Stack Exchange'
I personally don't think that is necessary. OK, some people only know LaTeX but have no idea what TeX is, but as the OP already says: LaTeX is in the title and the description. Also you will find the site with Google easily when you search for LaTeX.
Having two names will just create some confusion IMHO. Also AFAIK the Stack Exchange admins stopped allowing alternative names for SX sites a while ago. Before that we could have had a 'something.com' alias as well.
htlualatex.stackexchange.com
should redirect here if that's what you're used to typing ;-)