I enjoy Swordplay (amd most THW games) and would be interested in seeing more of the combat tweaks you propose - are you publish the tables here now?
I have also been thinking about tweaking things - if desired you can use some of your successes to affect your opponent
push back 1" for each success (towards a rooftop edge for example, into a fire, back over a low table, etc)
turnaround - ie: swap places 180 degrees (handy in a doorway fight/multiple melee) for 2 success dice. Also, if a fight is on a stairway I would add an advantage die for the higher position - the turnaround would be advantageous here too.
Adding these options while the fight is carrying will offer dynamic movement and Hollywood style swordplay and derring do
Swordplay is quite bloody and designed not to have long, inconclusive combats but this may add some extra colour during the early dice offs.