I think you are correct on most points, I generally agree with you. Our army is doing pretty well. Not top-tier anymore, but definitely still upper-mid where at least people won't complain that we're broken, lol!
The only issue I see is that all the lists you mentioned, Fangs of Sotek, Draco's Tail and Thunder Lizard are what everyone played before anyway. What 3e has done so far is to take Fangs down a peg so it's not the be-all-end-all list that makes all others look like you're handicapping yourself by using them. However, it took Koatl's Claw down even more, so our top and bottom army lists both got worse, allowing the middle ones to shine more. (Arguably Thunder Lizards got a bit better overall, but that's still one buff to two nerfs to our subfactions.)
The main reason I don't see an increase in listbuilding variety is because everyone's using more or less the same units as before. Most things that were good before stayed good, but a lot of things got worse, and nothing really got better aside from the monsters and objective holding rule. So while it's true that we have more than one good list in the army, those lists are essentially the same as before, just smaller because of point increases. So there hasn't been an increase in variety for our listbuilding, contrary to what GW was saying while hyping the new edition.
So I guess the point is that we didn't really see an *increase* in the variety of good lists. The good ones stayed good and the bad ones got worse. But again, I still agree with you that our army as a whole is in a decent place. It kind of hurts to get knocked from top-tier to middle, but at least we aren't in any danger of getting squatted like some people were thinking before the 2e tome came out
And finally, I would agree that it's probably *mostly* about Saurus, but not entirely. I don't get why GW doesn't like them, but buffing them would solve a lot of the issues that myself and other often bring up. They already want Skinks, Saurus and Dinosaurs to be their own separate lists, so why make the Saurus one purposefully bad?
I also wish that at least some of our dinosaurs were on part with other faction's big monsters, but that's been talked about a lot. I know that you prefer the smaller but cheaper monsters, but I'd rather have at least a few that were more expensive but were on par with other monster-heavy factions' big guys. I think if the Ark of Sotek Bastiladon could actually do a little damage in melee it would be the perfect cheap "spammable" monster. Stegadons are fine where they're at. But Carnosaurs deserve to have the stats more fitting to an 8ft-tall Lizardmen riding a roided-up T-Rex. It doesn't make sense to me that they're not stronger and it never will. The Dread Saurian was at least close to being on par with the Gargants, but GW hates people using Forgeworld models for some inexplicable reason so he got nerfed as well.
But as always, I appreciate being able to have a civil back and forth with you, so thanks for that! I'd actually really like to hear your side as to why you prefer the current playstyle and what you think needs to be buffed/nerfed/changed, if anything, about our army