When i say "OP" I mean "OP like Germany or Russia."
Which are both considered to be S tier by most MP players. My argument is that Khmer is now S tier.
Ok, so I had a go with the new Khmer now.
My conclusion:
The new Khmer isn't near the level of "OP", and comparing it to Russia is just dumb.
Sure, they can get high population and good faith, but that by itself isn't the standard by how you can judge something to be OP.
In my current game (which I cooked quite a bit with several restarts), I got work ethic and currently sit on about 12 cities where most of them have +4 to +7 base adjacency holy sites.
Strong, right?
Well yes, but not really.
The production, food and faith is surely ludicrous, but it takes a lot of RNG to have it set up.
And even with those silly yields, I'm still nowhere near done catching up with the AH (late medieval era).
Worse still, I was nearly taken out in the early game by Georgia, and only some old fashioned save scumming could keep me afloat.
The reason I don't think Khmer deserves to be mentioned as "OP" is easy - it takes a lot of RNG luck to set up properly, and you are very vulnerable while doing so.
You need both great terrain, not get killed early, ideally an early faith source (terrain yields, envoy, tribal village faith or relic) to reliably get a good pantheon (ideally Sacred Path or on of her sisters).
Khmer has no early bonuses to help secure those pantheons (Sacred Path is usually very contested as it's a jungle pantheon which at least a handful of other AI want to go for as well, so you'll rarely get it on the first try), nor does Khmer have other early bonuses to get the ball rolling.
Compare this to Russia, and the comparison is just absolutely stupid.
Russia gets put into tundra most of the time, gets extra faith to nearly guarantee dance of the aurora, a super fast holy site with extra GP points to get the religion up in no time, and on top of that all the GWAMs you can ask for the rest of the game.
With Russia you can almost guarantee a safe start (tundra starts are among the safest in the game due to lack of neighbours on all sides, allowing to to focus on infrastructure), and a pantheon and religion super quick.
At that point you can nearly guarantee the first golden age for monumentality, where Russia snowballs ahead.
TL;DR:
Russia is nearly guaranteed to snowball extremely hard right from the start.
Khmer has no such guarantees and is far too weak early on.
IF you get all stars aligned (gl with that), Khmer becomes strong in the middle game.
But is still behind Russia who has already started snowballing way earlier, for hardly no effort.
Khmer is NOT OP.