What do you think was lacking in the flavor profile? Salt, Pepper,garlic...Etc. I like the color that the CS ribrub gives the ribs, but I will add a little extra profile/flavor with it. I've even heard of some using a little chicken rub with it.
This is just the way Smokin' taught me...but I tend to rub the ribs and throw them in the smoker, no need to bring to room temp and yes, I've tried them both ways.
The tenderness is the hardest part to get right and the flavor will come with a little experience,practice, and good note keeping.