I have no time and intention to launch into a big discussion about scientific approach to mental states and their relation to the bodily ones. What I can tell for sure - describing and studying them scientifically in separation from other dynamic processes is deeply flawed approach.
You can, for example, find tons of studies about so-called 'attention window' or 'working memory span', but they didn't even mention that those characteristics could be dramatically reduced under stress or any other state of overload. There are a dozen variables on which it depends on, from the time of day to a noise level.
And, of course, calling Freudian works a hack is a little bit naive. Yes, you could call his Interpretation of dreams a hack, but he developed and extended a more general theory of mental dynamics, which, ironically, was known for aeons in the East.