I know what the thought process behind this is...and while you see it as a solution it is infact nothing but trouble.
I assume the reason your thinking about adding another singles titles is this...guys like Raven. Raven has been with the company for two years now and despite several NWA World Title Shots, he has yet to hold gold in TNA for even one second. It is a bitch no doubt. I think deep down we know that guys like Raven and...er...well I guess guys like Abyss and Hardy along with Outlaw & Dustin etc., but the mid-card guys who arn't X-Division will never hold a title other then maybe a usless tag team run (Styles and Abyss what was that???) Anyway your thinking that if a guy like Raven held a belt it would make him look more credible...now here comes the part where I disagree...
It won't work that way. Let's say, hypothedically they brought in the NWA National Heavyweight Championship (though good god leave the current champ Spyder at home please) and they gave it to, hell let's give it to a "Main Event" guy like DDP to give it instant cred, ok now let's have Monty Brown win it since he hasn't held gold yet...now we have The Alpha Male holding gold and looking like a million bucks...or does he? He is clrearly not up to Jarrett's level (or whoever else might be champ

) since he is holding belt #2...and let's face it, in TNA you are either one of three things...one you are an X-Division guy, two you are in a Tag Team, or three you have "Your sights set on the NWA Title". Why bring in something else that just waters down everything. Plus as mentioned before they don't have the time to promote the title, if they get a 2 hour show/replace RAW on Spike maybe, but it just doesn't seem like a good idea to me...
And here is the real kicker. Bringing in a title would help guys like Raven in theory, but Raven has a cult fallowing. He always will. Putting some usless title on him doesn't make him more over, it just makes fans go "OK now Raven has a belt". That is the biggest problem with WWE/WWF they asume just because someone walks to the ring with some gold we will care more about them, since Orlando got the US title has his reactions been any better? No. And if we're sticking to the Raven topic, when Raven held the Hardcore Title did it make people care about him more? No the ECW fans were pissed they he had a joke title, and the casual fans just saw him as another guy holding the 24/7 gag. Adding more titles is the last thing TNA needs to worry about right now. What they should be doing is working on building up someone who is a major dominate force and have him take Jarrett's gold...