Quit bringing in old WWE/WCW guys. I like that they brought in Christian an undervalued WWE wrestler. They should focus on those guys and less on the guys that drew money in the past. They should just wait until the annual WWE talent cuts and sign those younger guys like Kennedy and Elijah Burke on the cheap. Relegate most of the part time wrestlers (Nash, Foley,) to on screen roles. The less I see of these guys in the ring the happier I am. Nash should just replace that awful Don West.
Try using old wcw ideas such as spin the wheel, battlebowl, and War Games. WWE isn't doing anything with them so why not use them.
Last basic simple idea--less long winded promos and more in ring action would help differentiate TNA from WWE. I hate main event promos and TNA has been doing that a lot lately with the entire Main Event Mafia storyline/subplot.