I'm still not entirely comfortable with the one-way nature of the "treaties" DA adds to the diplo page, but that might be a modern expectation that treaties are mutually beneficial by definition (this system seems like submitting to tribute demands, not signing a treaty).
Pet peeve aside, I'm at a point in my first beta 2 huge-map game that is close to the same phase in my 1A games when I went out and pretty much stole all the tribute treaties in sight. The Treaties tab of the Diplo page looks *very* different (I'd post a cap of my Treaties tab if I didn't have to bother with a third party.)
I always play with 9 rivals and no one has been destroyed or surrendered yet. I have no tribute treaties, but there are 4 different mutual-exchange pairs among 5 different AIs. Whether or not I can persuade the devs about my language point, it appears that the AIs might be fundamentally inclined to think of these as "economic exchange" and "research exchange" treaties. Which I admit is a semi-backwards way of asking for both what I've complained about and what I thought I wanted...