It would be nice if "\ [ Transpose ]" etc got displayed as they do in mathematica.
Perhaps this could be achieved with a @font-face containing the Personal Use Area symbols used in mathematica
Even if copy+pasting directly into mathematica would work it could arguably be better if it got copied as "\ [ Transpose]" for pasting elsewhere.
(The non-PUA symbols like greek letters might be easier)
Capital i and lower case L are indistinguisable in the default font, it seems ripe for confusion on a math and programming heavy site.
In the code blocks they fortunately do not:
( Only checked with chrome/firefox on fedora)