I can of course only tell of data we have and my personal experience - west coast players on White Tiger did not tend to exceed the 200 ping notably, neither on the other official servers. Exceptions will very likely exist.
You also state that the US players mostly play on community servers - that's what they did when an official server was available as well, which was a major part of the reason the official was not being used. I still see lots of them on our official servers as well, though, just as before on the EU officials even when the US one did exist.
It is unfortunately very unlikely there will be another official US server anytime soon though - we do not get many requests for that (yours being the third I noted for this year, I got more requests from australian players) and the US population seems to be pretty happy with their community servers, especially considering the use you described, because US players do make the biggest single sales group of Eco, but EU totals out higher in both sales and player numbers, even if that might be to your surprise - it's been like that forever.
Central EU is hence the place of the majority of players and a pretty good place for servers the vast majority of all players can play without having notable issues, while a US server does not provide for the same effect - but has five times the cost, which does unfortunately play a role at a budget limited small studio, especially as US hosters do not seem to have the hardware we use for EU servers as a thing you can widely get as a normal customer for prices that are usual for a wide customer base, but mostly as special things or needs to be co-located. (We use Ryzen 5950X CPU servers)
If there is enough interest, people can let us know on respective channels though, we track that feedback. It's enough to note in any conversation basically on any of our channels. If there will be enough interest it'll be automatically considered, just as any other thing for Eco as well. It might not always be super obvious, but we have a strong habit of collecting feedback on all our channels and it's regularly brought up internally as well.
I'm not totally sure if an official server would actually provide the experience you are specifically seeking, as they are quite different and most have rules that prevent any behaviour that is generally considered disruptive or unfair in the community - which is not the case on all community servers. That is given I don't know what exactly you mean with 'vanilla' experience though, given our official servers aren't "vanilla" either, aside of mods - with the exception of White Tiger which has mods. Darwin's Fox starts out with a basic government and currency. Official servers have different rules, tend to attract different people and have different runtimes, which makes zoning them on regions hard - as each of the official server has a specific setup fitting a specific purpose, so we'd need to copy all servers to the US or decicde for a single of their concepts for the US server. This might actually also have played a role in the low usage back then, as the population needs to be big enough to not split itself up but also to have interest in a specific concept. An actual 'vanilla' experience for Eco does not really exist either.
In opposite we actively encourage people to play on community servers that do the craziest stuff, because Eco comes to life by the very fact it is more of a sandbox framework admins can do exceptional stuff with - and we consider every single one of them vanilla, as in that's how Eco shall be experienced. In all these ways.
// Edited for clarity at some points, it's too late here, lol.