Having multiple people in an RP has its negatives, but all of them could be solved with a quick 10 minute discussion beforehand.
I get wanting to stay where you have control and are most familiar with, but 6 people, each with a distinct personality and able to add infinite amount of flavor to a setting then 2 people can.
It’s also easier to throw away a roleplay when there is only 1 other person. Too many times I’ve had someone I’m interacting 1 on 1 with just suddenly decide they don’t want to continue anymore. That basically means all my efforts were a waste. With a group RP if 1 person drops out the story doesn’t just end, it can continue and be repaired.