First off, nice bike! A Schwinn Paramount of similar vintage is my “Holy Grail” for a bike . I agree with others that the cable housings are too long. My F-I-L always had his long like that and it drove me crazy (perhaps he did it on purpose?). The OP’s end result looks much better. I’m always debating with myself on whether the cables should be routed in front of or behind the handle bars. I believe the “standard” is behind the bar but depending on stem reach, routing in front of the bar might result in less bend of the housing. I do have a couple of bikes set up that way. Speaking of “standards” seems to me that the bike shown in the #2 reply has the front brake operated by the right side brake lever . I do suppose that it could be a “mirror image” photo. I’ll concede to those who believe that it’s personal choice but if I set my bikes up that way, I wouldn’t let anyone else ride them! (I rarely do THAT anyway.)
RE: installing a bottle cage, I would definitely take all necessary steps to prevent damage to the paint. (And would never consider RivNuts on a bike of this caliber ). Handle bar or seat mounting strongly considered.
RE: drop bar position, bravo for the OP for holding fast to personal preference. Just to get it out there, I set mine up “old school” with the axis of the lower bar pointing at the rear axle. Just sayin’.