HST is a well setup program that gets very solid results over a broad spectrum of lifters. It is different from just about every other BBing program but directly in line with what the entire world (outside of the BBing community) uses to train their athletes at the professional, Div1, and Olympic levels. Dual factor programs have been in use for a long time and there is nearly universal agreement among strength and conditioning coaches and researchers around the world that this is drastically supperior to the typical supercompensation programs employed in BBing (outside of BBers and gymrats - not exactly paradigms of knowledge other than relating to anabolics - this has been a desolately lonely camp for decades).
At a minimum it is at least worth the time to look into rather than thinking up a new exercise order or superset combination which at best will yield short term results.
Post #15 in this thread is a more in depth explanation of dual vs. single factor and how it works. The thread as a whole is based on a different dual factor program:
http://www.elitefitness.com/forum/showthread.php?t=372686
Here is what one of the better strength and conditioning coaches in the world thinks about dual vs. single factor:
http://forum.mesomorphosis.com/showpost.php?p=48&postcount=3
It is from this very good thread that covers a lot of topics:
http://forum.mesomorphosis.com/showthread.php?t=12&page=1