Not saying it should come above, but they are the two most popular servers and some of the only ones that share a language. Not sure why you think it would be every year? Currently it's every two months there's a world in both us and en. I don't think changing start dates of worlds puts US servers above other countries, I'm not really sure how that makes sense.
I'm saying instead of 2 worlds at once every 2 months, 1 world every month between US/EN. Like I said in the post, en world in march, us world in april, etc, etc. So basically they'd still get the same number of worlds the release dates would just change...
Other servers have smaller player bases, and also don't speak english (i.e. have no interest in playing in US/EN...) so they could stick with the same release dates. But hell, change those up too if there are any overlapping languages. Not trying to be US-oriented here just trying to make it easier to play multiple worlds without waiting 2 months.