there are only three remaining things at that park that truly count as usa propaganda to me:
the piano covers of patriotic music in the little city square area in front of patriot
flight deck specifically, a ride which was constructed as top gun (propaganda), ironically in the first era of the park where they truly broke away from the concept of the park being america-themed (as evidenced by like. the entirety of action zone. and survivor the ride specifically???)
they play the national anthem at opening but i've seen a lot more rushing to get paperwork signed off to that anthem than i have seen people saluting to it
btw, i'm sure it was motivated by the proximity to EA, but mass effect famously isn't even american. it's canadian. neither the USA nor canada even exist in mass effect.