I've never noticed huge resources going into print liaison frankly. Most of the people design with print are just performing the same function in digital. It really isn't as simple as approving an author word file and uploading it. Cover design, proofing... They're still there and with digital there are extra jobs too. 

I really suggest you read the Michael Holt piece referenced in the latest post. Extract...

Digital preparation. Granted, most new books start out as a digital file. If they aren’t already digitized, then they have to be scanned or manually keyed in. But that’s only the beginning. Publishers must then format the books, so that they work on all the various eReaders.
Currently, there are about six major formats. Some are similar, but each has its own nuances and quirks. In addition, publishers must collect and add all the relevantmetadata, so that customers can actually find the books when they search for them.

Quality assurance. Once the publisher gets the eBook formatted for a particular eReader, he then as to take it through a quality assurance process (often referred to as “QAing” the book) to make sure that each of the major eReaders renders the pages correctly. This is a time-consuming and laborious process.
This is fairly easy with books that are straight text. But few are this simple. When you add epigraphs, pull quotes, tables, charts, graphs, illustrations, footnotes, etc., it quickly becomes complicated. In this sense book publishing has become much like software development. At Thomas Nelson, we have seven full-time people managing this process, and we’re currently looking for three more.

Digital distribution. Once publishers have finished the QA process, then they have to distribute the files to the various eRetailers. You might think Amazon, Barnes &amp; Noble, Apple, and Sony are the only ones out there. They’re not. We are currently distributing our eBooks to more than twenty separate accounts.
Each of these has a different upload protocol and digital asset management system. When something changes in an eBook (e.g., simple corrections or a new edition), publishers must re-distribute the new file and ensure that each eRetailer has the current version. Publishers must also collect payments from these accounts, ensuring that they are getting paid for each download, so they can, in turn, pay their authors.