Not sure what is going on in Crucible after the update.. Matchmaking is garbage, matches are completely one-sided, hit detection on everything is all sorts of messed up (getting reports from a lot my friends, not just from personal experience), getting shot through walls, dying from melees after the enemy was already down for 2-3 seconds, etc.
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If it was to be connection based only, you wouldn't experience much of that at all. Its simply just lag.