- Deactivated luatex in favour of pdflatex thus switching to
  \usepackage{helvet}.

- Style: Deactivated \onehalfspacing, instead using \setstretch{1.4}
  which is nearer to what Word does when one-half spacing is
  active. (Measured on my printer, though; also using LibreOffice but
  cross-checking against MS Word.)

- Switched \usepackage{biblatex} from backend=biber to backend=bibtex
  as the latter is much more commonly available.

- Deactivated packages: paralist, tabularx, graphics, xifthen.

- Activated packages: fixltx2e, url, enumerate, graphicx.

- Re-implemented title generation so that author, date and time can be
  accessed later on (e.g., in the statement in lieu of an oath,
  "Eidesstattliche Erklärung").

- Style: Changed the page geometry; top, bottom, and right margins now
  have more space (tested on my printer they comply up to +-2mm with
  the guidelines).

- Style: Switched to one-sided printing in scrbook (as required by the
  guidelines).

- Style: Switched to use small headings.

- Style: Activated separator line for page header (i.e., chapter
  title).

- Style: Deactivated (some) customisations of the chapter and section
  headings to be more Word like.

- Style: Moved copyright notice to chapter "Eidesstattliche Erklärung"
  (there's no longer a backside of the title page).

- Style: Moved list of abbreviations towards the end of the document.

- Style: Changed "Eidesstattliche Erklärung" to be an ordinary
  chapter.

- Added To-Do List before printing in the very beginning of the file.

- Added macro \TBD and \TBD[Hinweistext] for marking ToBeDones up.

- Many reorderings within the preamble.