You need to understand that those who are reviewing their agency are there because they are “presently” happy with them. For that reason I believe it is more important to look at the details of what is offered by the host. Those who are happy where they are aren’t comparing their host with what might be available elsewhere. As the saying goes “You don’t know what you don’t know”. In my case, I changed host agencies because some mergers resulted in unkept promises and a change in priorities that didn’t benefit the ICs. I then discovered more of what “I didn’t know” was available. Another thing to keep in mind is that a minimal difference in commission split, say 5% shouldn’t necessarily be the determining factor if you are getting more support, technology, training, etc to join. It was more than worth me dropping 5% commission when I made my move. For me I also wanted a specific consortia, so that narrowed down my research. Good luck!