We made a simple change that has made parry more popular. Basically, a successful parry does not use your reaction. One on one it allows you to defend yourself against multiple attacks (Lightning attack etc.) and gives you a reason to use parry rather than Dodge. A failed parry uses your reaction (explained by the interruption you would have by being struck by a blow).
This has made for more entertaining fights, and has encouraged our Marines to get into the thick of the fighting where Marines are supposed to excel.