Here's a great sparring clip between some Kendo practitioners and some Miao Dao folks. It points out some interesting things. (Wait through the animated, winged, fantasy warriors for the actual sparring bouts)
First I like how the participants are going pretty full on - decisive entries and engagements, some good power strikes and opportunities taken. (Don't go low, if your opponent can take high, folks! :-))
There's even blocking, tangles and body checking - Nice!
Now of course much of this is possible because the participants are wearing armor.
Fair to say that the Katana and the Miao Dao were both battlefield weapons where armor was employed, so tactically taking glancing blows in a historical context is absolutely valid, however, this sparring scenario is set up more as a one on one duel, circling instead of forward pressure, and square stances instead of shoulder first stances, more common to armored systems where the armor itself is used for defense and offense.
So here, the armor has both benefits and drawbacks.
The benefits I listed at the beginning - Armor allows for committed entries, greater risk taking and heavier, safe contact.
The drawbacks - Greater risk taking, and more 'double deaths'.
Note that as many strikes connect on exit as entry, probably more, and how disengaging is a tricky business. Both Kendo and Miao Dao guys are aware of this, succeeding some of the time, but not at others.
Getting out is a big part of the puzzle, and should not be forgotten about. Building in a loss of focus, or a feeling of everything being over, in range, is never desirable during training. Practice entries of course, but never forget you have to exit too.