You may be overlooking quite a bit. Any member here could start listing massive improvements in lighting and software design that Stern has made standard since LOTR (cabinet construction and clear coat/insert issue jokes aside). The stuff just didn't exist and is missing from games released before the pro/prem/LE game models.
This is just like comparing pinball games from 1980 or 1992 with games from 2018. There really is no fair comparison. Times change and stuff gets better integrated man.
"Better" for you? Ok, I agree with that. Better for the masses... I don't know about that one. I don't think a LOTR would appeal to nearly as many patrons in a barcade as Star Trek, Star Wars, Kiss, or Iron Maiden. BEFORE OR AFTER they are forced to play LOTR. You could put LOTR on free play in all it's incandescent GI glory and those other 4 Sterns next to it and they would still kill on location.
Putting that scenario together makes no more sense than comparing pins from 2003/04 with games from 2016/17/18, stating one is better than the other. Better in which ways... design, earnings, sales, replay value, secondary market sales, audit/ops management, collectability, ect.
Answer this question for me. In your opinion, when LOTR was released, what pin did it surpass as the best up to THAT point in pinball history?