Any reduction in university time is valuable, even 10%. One of the best defensive trees to research and maxed is Sultan Saladin. Virtually everyone in my alliance have villagers committed to this tree full-time (but we are all late atomics, so any buffs in defense help). The Atomium saves the player 78d for a complete Sultan Saladin. This is just one tree. I often have 3-4 trees researching at the same time. Whether one crowns the university researches or commit villagers to them, it can make a lot of sense to build/switch the Atomium. It's a time reduction wonder's nature to reduce research time. They are supposed to help you along the way. If your research gets done faster, then it did its job. See what I did there?
Wonders serve different players differently. Ratings differ depend on Age of the Player and where their upgrades/researches are. I could care less about the Atomium weekly ability. Likewise, I could care less about the 5/5 United Nations because I almost always have 28 of all Nation Trade Goods despite warring 3x a week and always activating x3 level 5-6 coalitions. The only useful aspect of United Nations for me is the defense aspect, which will get massacred by x1 mk6 strike fighter. To me this is a 3-4/5 wonder at best. For Pentagon, I don't have a 4th strong general (only level 21), so the defense aspect is minimal. I lose 1-2 strike fighter a day in raids (unless I decided to stop playing and go on a suicide run), so any savings in airplane training time doesn't really change my play style. This wonder would be a 4/5 and maybe a 5/5 when I get my 4th general to level 31. I'm sure you know by now that shipyard expeditions are almost useless, hence the only valuable component of Pentagon is the extra villager. I actually have the Pentagon, but given my heavy investment in the University, this proved to be a mistake. I should have switched a long time ago if I actually had the crowns lying around. As you can see, there are no objective ways to rate wonders (except a few really awful ones).
I don't understand why you value 10% reduction in resources like gold and food. The most valuable aspect of this game is villager time, resource can be had so quickly unless you play less than 30min a day. The only good 10% reduction in resources would be oil, and that's only because of Amelia.
You actually missed one very valuable features of Notre Dame, the 10% reduction in research applies before the research. Hence, you do not need to fully maxed all mills prior to upgrading troops in the Blacksmith/Armory. This is very valuable once you enter a new Age, as you can get a head start over someone who does not have Notre Dame.