So sell me on the Monk class, 'cause it doesn't look very good to me...

[KorvinStarmast]

It is a point of interest to me how small that team can get before the monk's team potential hits a break even point and you wouldn't just be better off being a tank martial.

Good point. The game was built / balanced on a 4 person party, and I seem to see a lot of the adventures from the official side seem to be 5 person parties.
With a three person party, I can see where a monk might not be a good fit unless you have a warlock spamming eldritch blast (can crit, gets the advantage roll form stun) ... when I wrote my post, I was presuming a 4 or 5 person party.