If CN aired the the show more times there is a chance that it will get more viewers. CN just shows re-runs and movies a lot o the time anyway. Put Thundercats on weekdays in the afternoon block when kids come home from school they could probably get more kid viewers. Back when Toonami was an afternoon block it did great, because of that. They are going to kill though for not getting the ratings they wantedinstead of experimenting with times to see if that has anything to do with it.
Kids aren't idiots. They are capable of watching a show with a long story arc if given the chance. I used to when I was a kid. But I got to see those shows, because they came on afterschool when I could see them or a established Saturday block like the old Fox Kids and Kids WB. It bothers me when I see networks afraid to test cartoons like Thundercast or Symbotic Titan on Friday than move it to Sat morning where the ratings get even lower and cancel it. If they try them on afternoon blocks for a little bit and see if the ratings go up or down they could get a good sense.