The Campus is still just totally and completely OP. Science is really powerful and also so easy to get. You unlock Campuses really early; the Tier 1 and 1 buildings are easy to get and chop in; you can boost Campuses and Buildings really easily via Policy Cards and City States; and the Campuses and Buildings then just give you Great Scientists which just give your more and more science. Add in some Pingala action, and the blue beakers just flow and flow and flow. As a result, while there are other cunning ways to wring out science from the rest of your empire - trade, alliances, policy cards that aren’t Rationalism etc., Dedications, tiles, Specialists - , none of them really matter. Just build more campuses. And if you can’t, then run more projects. The game currently has a lot of issues around pacing and difficulty. But too easy science is a big part of that. Worse, all this easy science just makes the game boring.