Yes on pirate world. Not just pirate, that would be limitting, a 1700s-1800s world, complete with pirates, but also cowboys, ye olde cobblestone streeted dirty towns with factories and child workers, maybe even ninjas, exploring exotic mysterious islands with savage cannibals etc etc.
edit, also this-
Seriously. That is bethesda's "lotr", to then do lotr would be beyond weird, and also redundant, reductive, and boring.
Bethesda needs to branch out and do more, but they have medieval fantasy covered. Just as they have post apocalyptic future covered with fallout. Still tonnes and tonnes of settings left to explore. The two that stand out to me as infinitely badass are the above mentioned ye olde 1800sy pirate and cowboy world, but also an early stone age tribal caveman world. Then perhaps a space exploration/alien planets "solar system" when it can be done justice.