Personally I love both the original and reimagined versions of Battlestar Galactica. To me, there does not need to be an either or choice. Take the best of both. By all means keep the Colonial Warrior jacket, because that's one of the coolest things to come from Battlestar Galactica. It goes very well with any type of OD Duty Greens or Khakis, so it does not necessarily have to be like TOS under the jacket. By all means keep the reimagined type of flight suit, with modifications if need be. If you don't like the middle button up shirts with the jacket, then maybe the "chef jacket" layout like duty blues in the original version, maybe with buttons, zipper, etc., with or without the pleating. Maybe a pull over version with a round or V neck as well would be acceptable, with or without pleating. The pleating it self could be a sort of flack jacket for shrapnel if hit, as well as originally for "slug chunkers" when pullets were still in use...or also maybe some energy blasters, pulsars, etc. How about using the directed energy weapons of TOS, but the more realistic FTL jump drives. By all means keep all of the cylon types and raiders, AND add on some of the stuff Richard Hatch was going to present before 9-11 screwed up production of his movie. It would be best if it were a question of being INCLUSIVE rather than exclusive. If you want to use some of the older tech stuff from the reimagined version, that can be Adama's viper and battlestars from his era. Lots of opportunities for flashbacks. As far as Vipers go, any and all variants are fine in outward appearance. Let'em cruise and maneuver slowly using ion drive engines like in the reimagined, but also have tylium, mater/anti-mater options for faster combat, like in the original version. There's no reason a viper can't cruise slowly and do all of the fancy turn on a kubit and fly sideways while blasting away and doing an about face, and not also go full throttle at various levels with the huge vapor/flame trail as well. Lots of combat applications. I also like the living in an asteroid field idea presented by Richard Hatch. Great place for mining operations and rebuilding fleets covertly. Lots of plot twists possible here. Maybe by a gas planet that provides a good source for fuel, tylium, or what ever.
Also, it does not necessarily have to be a reboot. It can be a continuation of the reimagined, but from the perspective of other Colonials who escaped separately and set up base in an asteroid field near a gas planet, etc. That way the ending on the reimagined is not changed, and there's lots of opportunity for flash backs to older tech reimagined stuff, with lots of high tech real time stuff as well.