> Also the behaviour of reappearing table-cell face after switch back to
> fundamental-mode or text-mode seems to be not quite right, shouldn't it
> reappear in every cell at once (just like it disappears)?

If I understand correctly, this is rather a bug in table.el: it should
use 'font-lock-face instead of 'face, and then all this buggy behaviour
will go away.  Perhaps you'd like to send a patch?