The '79 Glen Larson version was limited by it's budget and I'm sure Universal didn't want a repeat of what happened with Battlestar Galactica nor did NBC. But I do think that the pilot for the series contained several good ideas that could've been expanded upon had they wanted to go that way.
And, yet, that is exactly what they got. BSG was refilled in the second season to become G1980. Buck Rovers was retooled in season 2 into something almost equally kiddy. Both were cancelled after their 2nd seasons.
As for Buck freezing... my concept would have Buck actually freeze in one of those deep seadiving suits that use breathable liquid oxygen. Buck is frozen but preserved until recovered in the 25th Century where modern medicine is able to revive him.
Keeping the show in the Sol system eliminates the need for stargates, no matter how cool they are. I always assumed Earth built the stargates, since they were constantly in contact with/looking for Earth colonies.