Honestly I really don't like the kids much. The ones I do aren't really 'the kids', like Atom Smasher and Dr. Cross (when he's written well... which hasn't been in forever.) They were pretty much separate characters who took inspiration. Stargirl has her moments too... But other than that I love the original JSA. Rex instead of Rick. Alan instead of Jade and Obsidion. The idea of just sending over the kids doesn't interest me at all. we already have Teen Titans... or two or three The young heroes learning their place in the world is well covered.
Personally my favorite idea is just keep the Earth 2 around and have many many crossovers. Much like the Crime Syndicate or any other 'alternate universe' Justice League... I love having the counterpoint, but without the whole 'Listen to your elders' thing that they did with them post-crisis. I like the JSA to be the JLA's peers and equals. The kids?? They just aren't that interesting to me.