I think I take it too far. Probably the only two things people absolutely need are consent and coordination for, yes, boundaries, like you said Gesakaarin. What kind of set boundaries have you found that work well for all parties involved?
The boundary setting for me isn't in general, but rather specific to the nature of the character Veikitamo Gesakaarin. She is not a nice person. Her entire animus as a character is a fanatical drive to serve her Company and fulfill the vision, as she sees it, of Matias Sobaseki and his legacy as it exists in Kaalakiota. That she is willing to do anything, and sacrifice everything to achieve that aim. As such the establishment of boundaries in an adversarial paradigm revolve around a) why she would involve herself with a character given the above context and b) a recognition that if she's the type of woman who will gladly burn her own reputation and machine gun as many people as needed next to a ditch for the Company she is not going to care about the welfare of their character if given due cause.
That's why I find having a convo window open helpful for OOC rapport building and discussion while scenarios unfold so that parties involved have a clearer understanding of what they want out of it. However it's always dependent on the personalities and characters involved as to whether or not the particular RP descends into a complete shitshow or slapfight.
My own experience of RP, and not only in Eve, is that it usually does because those involved desperately want the validation/attention/pat on the back by, "winning", and wanting to show others how super awesome they are. Instead of just looking at it as trying to create interesting interactions between those involved and working towards building something everyone can get something out of.
Which is why 90% of RP in Eve is just mediocre drama driven by mediocre personalities to me.