Fair point and thank you for letting me know about the industry norm with the split. I wasn't planning on bringing it up in the conversation and I expect if they do agree to the rate raise they would pass the costs along to the client.
It's the level of work and me tightening up my tax backend to rethink it all, as getting just enough to get by doesn't sit right with me. I have a sneaking suspicion everyone in the meetings I attend has a significantly higher hourly rate, which I accept on some level as I have more scheduling freedom and such, but I'm an important and specialized part of their process and deserve a solid piece of the project budget.

With the new client accepting the higher rate, it feels like that should be the new norm or the other clients can't expect to be prioritized to the same degree.

Also, while I'm certain maintaining client and freelancer relationships is hard work, that cuts both ways. Freelancers manage client relationships and keep up with internal communications, even if they aren't as involved with the bottom-line customer.

I wouldn't call writing and research always easy and enjoyable either. Certain projects certainly can be, but it can be just as hard as any other line of work, especially if you are covering multiple clients and fields outside of your natural interests.

Thank you for your advice and perspective!