I agree that the one hander is far more fun to play and hit the ball with. Also without wishing to sound snobbish, but I enjoy being part of a more 'exclusive' club of people who play with one handed backhands, rather than being just another two hander.
With regards to the return of serve, it's true that the two hander is far more reliable and even when one handers were more common on the tour most of the best returners had two handed backhands.
The two best one handed backhand return of serves I've seen belonged to the Germans Becker and Stich. Becker of course was an incredibly strong and powerful guy which helped, and his backhand return of serve was very effective against Edberg's kick serve and a major reason why he won 25 out of their 35 matches.
Stich's backhand return was a huge weapon as well and in the 1991 Wimbledon final against Becker the commentators were mentioning how it was one of his favourite shots.
i don't think there's any advantage in ROS between the two styles at all whatsoever.
With one of them you have more reach and develop an eventually better, more precise slice, with the other you have more stability when taking the ball on the rise.
It's been a long, long time since kick serves stopped being any problem for anyone.
One handers have problems against high bouncing topspin lift on clay, on sunny days. That's it.