I think it would be useful to replace all constants appearing in various
style files with symbolic names and store their values in separate files
(e.g. stylename.val). This will significantly simplify style customization
(and, probably, improve performance), since sometimes the only difference
between style provided by standard LaTeX and one required by a particular
document is e.g. size of space between chapter name and its first paragraph.
With best regards, P. Trifonov