Tim,
I would say that you're at Pino's Stage #3.
I don't use humidity Domes / Bins for any length of time, so I can't comment on their use except to advise to harden off the cuttings to ambient humidity as quickly as possible.
Your mix may also be a problem, from my experience the fine particles of vermiculite will hold too much water next to the cutting and roots. A fast draining potting mix and or sifted Perlite may be a better growing media, which will provide the necessary aeration that is needed for healthy root growth. The mix needs to remain damp, never wet, but well aerated.
Since they are already rooted, you could also pinch (remove) a few of the larger leaves, but leave the stems attached to the cutting, the stems will fall off by themselves. Watering with dilute fertilizer should also be done at this time since the cuttings have roots (1/2 teaspoon Miracle-Gro All purpose / 1 gallon of water), I also use it as a spray to mist the leaves.
Good Luck.
BTW, the Kadota1 and TWEb#1 don't need to be in a humidity bin since they are already rooted and have minimal leaves.