I've lately been viewing Round 1 a lot like something GOT fans can relate to:
A mix of not taking teams seriously, and facing teams that were already in the groove led to an early exit from a lot of confident teams.
From Round 2 onwards you assume everyone there is 'feeling it', and depending on how your bracket looked... I think the 'better' team won 3/4 of their series'. It'll be interesting to see if this BOS/CAR series is a good one, or if Boston makes short work of them. CBJ gave them a good run in a few games there, and Carolina suddenly finds themselves the 'cold' team.
It'll be interesting to see if the 2019 Round 1 is a learning lesson... or as it seemed early: a reason for re-thinking things.