This is awesome! Great work. One must have for me is auto complete, I use LaTeXila and its hard to move away from auto complete. Spell checking would also be amazing, I have yet to find a good LaTeX IDE with spell check.
[1]: It might however be necessary to redefine one of the shortcuts for either flyspell or autocompletion, since they both use the same keys by default.
Lately, I even left pure LaTeX and migrated to org-mode and its LaTeX/PDF-export. That is a pretty brilliant combination, I must say.
Really among the many things Emacs does, LaTeX is one thing it does exceedingly well.