It took me a while to enjoy this OP. When I first heard it I thought it was shit, but I love it now. When you watch it with the lyrics, it works a lot more. The way it uses lyrics from all the previous OPs timed with visuals as well as it framing this arc as a last-ditch battle is just pure kino. I think I was distracted from all the slo-mo in the visuals.
Redoing the iconic "Sied iher das Essen" but using the "On that day humanity received a grim reminder" instead is genius
Song is god-tier, it uses leitmotifs of previous OPs while still being its own composition, which conveys the nature of this being the ending of the story (well, not really, but this part at least) The animation is meh though, only the last third is actually good - and you can see how stingy they were with its budget (LMAO that CGI CT, even S2's model looked better if they couldn't be assed to draw it in those few frames)
Bentley Jones
>The animation is meh though I would argue that while that's true, it's supposed to be in slow and little to build hype for the upcoming arc. Just little teases and the like before exploding in the last third as you say.
Adam Gray
>yumiya line as Op1 animation goes >Tsubasa line as op2 animation goes >Shinzou line as op3 animation goes >Requiem line as op4 animation goes
Mostly because it reuses stuff from the previous OPs/EDs and then there's the couple seconds of ridiculously bad CG. Still, RtS has a lot parallels and callbacks to the previous arcs, especially Trost, so I guess the part about reusing stuff fits in that way.
The parts where they reuse stuff in the last part of the song is supposed to be mimicking shots in the previous OPs when those lyrics come up. Admittedly, it's still pretty cheap but it is cool