I think the series will be fondly remembered as time passes. Five full seasons (plus whatever's still left to release) isn't too shabby for a sci-fi/fantasy series of any stripe, animated or otherwise. CW lasted longer than, say, Enterprise
or even TOS, and there are so many Star Wars fans of all ages around the world that there'll always be a market for telling the plethora of stories of what happened during the Clone Wars.
As long as a kid watches A New Hope
and hears Luke Skywalker and Leia's hologram mention "the Clone Wars" there'll be a market for the series.