I think this might just be a little bit better than being in a 6 man Team Canada where you aren't the star...just a little bit better.
TNA is focused on giving the belt to somebody who has already established them self as a star in the wrestling world and guys who have become a household name, any other guy being champ is just a transition champ for the time being (Abyss). I am imagining that TNA is trying to put the belts on vets who don't mess up in the big time situations.
Roode is only 30 years old, he still has quite a bit of time left in his career before he has to hang up the boots. Let's look at Chris Harris, he just got his big main event break at Slammiversary and he is 34 years old, that is 4 more years of experience in the ring and on the mic refining your skills.
The Roode/Young feud is just there to build up both Roode and Young for a bigger feud and a little bit more up the totem pole for the TNA Heavyweight Championship for both of them. It also works on building heat for Roode and building some pop in for Young and get Young experience to play to the crowd.