Well, there's always a chance that some of these shows just aren't that good and would get passed over in any era. But assuming that we are right, and they are wrong, and people just need to be in the right move...
Road Rovers--I thought this show could have been the next Teenage Mutant Ninja Turtles. Alas, it wasn't. Among other things, it has the misfortune of coming out just as light-hearted action/comedy shows were on the wane. The DCAU leading the trend towards more serious action, and the anime craze was poised to take over Saturday Morning. Lost between those two forces, Road Rovers was quietly canceled and forgotten about.
ExoSquad--as mentioned in the first post. I remember seeing this show on Saturday about noonins-when I should have been getting outside and doing things-and on weekdays at 7am before school started. Networks don't give timeslots like that to shows they respect... ExoSquad might have gotten better treatment if it had come out in the 80s, with all the other toy-centric toons. Ditto in the early 00s, when Gundum and other animes made animated space operas cool again. ...I still think it was a missed opportunity that this didn't get a second push-or even a dvd realease-during the gundum craze...