When I first started with trains, it was during the beta. I had to run rails straight through a large clump of Omegas in my Sunny Isles but to save on too much jiggery-pokery I only had a small station amongst them. So to be honest my passenger flows were not so important. I was more concerned with my mission to link all the islands with rails.
Why?
Hmm, someone somewhere in one of the fan pages said it couldn't be done. Along with a plethora of Moaning Minnie's moaning about everything railway related 🤣
Yep I'm the guy who did it just to prove a point and annoy the naysayers as well 🤣
Eventually stations were moved and replaced and my lines link all the islands still but only needs 3 stations to cope with the demands when I need coins.
Anyhow back to your issue.
I dunno if you noticed or not but there is only one connection on the Metropolitan Station, it's what I would call a Terminal, so if you lose that loop of track next to it, you may be able to squeeze in more houses around it 😀
Unless of course you need the loop to make the station work? I dunno your setup or plans 😆 My Metropolitan is at the end of the line on the 4th island.
As for passenger flow, it varies, if you are in a hurry for coins and chewing up passengers, it will ebb and flow, it's never been something that would cause me much of an upset these days.
Keep On Rolliin'!