Yeah the OB UI is pretty simple looking, which I’m probably not going to replicate. I’ve decided to go with a more hybrid FE/OB approach, more of a homage than an explicit remake. Not sure what that is supposed to look like to be honest. I’m not too terrible at splicing things together for portraits, but creating UI elements is not something I’m experienced with. I think a cool looking title screen would be very helpful since it isn’t something I can cobble together easily from the asset repo. The tentative title for my game is “Fire Emblem: Path of Kings” Something that draws inspiration from both series would be nice. I won’t ask for more until I have something to show for myself. 
As far as UI goes, I really like your FE9/10 combat UI so I’m probably going to borrow that(with your permission, that is). I got a stats screen from the repo that almost matches it, I might have to modify some colors but it shouldn’t be too difficult.
You have a lot of cool looking maps I could use. The floating isle one in particular screams OB to me. I’ll see if I can use that one in my hack as well.