i just watched the director's cut which apparently is far superior to the theatrical cut (i have not seen the TC). it was great. not a normal exorcist movie when you watch the DC. far more subtle but less artistically shot than what friedkin did. works better as a detective story and psychological thriller than a horror movie. if you watch the DC, you have to forgive the fact that the added footage is not finished - it actually looks terrible, LOL.
on a side note, i think most of the people whining about the "snyder cut" wont like it if there is no money put into finishing it. unfinished footage looks horrible when mixed into a finished movie.