@LedZerggelin
In DL/DA (but apparently not in TA, unless I've toggled some option that I didn't know existed) you are informed when a race completes their tech/economic/manu cap, etc (as well as some other things like trade goods and galactic wonders, but that's not relevant for this dicussion).
Yes, it was changed in TA to stop those dreadful players like Iztok and KP (and me ) abusing the poor AI!To be fair, it was far too easy to run your empire without ever setting the research slider above 0%. Still is really, just takes a bit longer to get there.
Admittedly, it's not WORTH it to get an eco treaty from an AI (minors notwithstanding, as they can sometimes be just gullible enough to offer it) in the first year-or even the second, in fact-but it is by no means impossible. It just takes about 30-50k.
As far as TA and research treaties...haven't tried it yet. I'll get to that in a bit.