From what I've heard just to be safe replace it.

I have not built an ARF Vector, but have built two ARC Cardinals and one ARF Nobler. I saw the crimped leadouts and didn't think twice - I cut into the center section and replaced the leadouts right away on every one of these planes. They all have many flights and are still working well.

I have enough problems in the center of the circle already. To achieve success in this hobby/sport, you should try to eliminate as many problems as possible. That's why we spend so much time, effort, and money to build straight models, get consistent engine runs, and trim out our planes.

Why leave something to chance? I have seen a couple of these planes fly very well in stock condition, but I have also heard a few horror stories. 

My vote is to go ahead, spend the two hours and change the leadouts. Then you can worry about something else. 

Do yourself a favor and replace the controls. My arf Nobler made 1.5 flights before the pin fell out of the elevator clevis,guess what happened then? Two new motor mounts and a new cowl, great planes sent the cowl for free after I called them about the clevis failure. Better safe than sorry. George

I believe that the Vector ARF/ARC bellcrank and leadouts are fine....
I am slipping a .225 o.d. carbon pushrod OVER the stock flap to elevator pushrod to eliminate flexing and I am using a HD DuBro clevis....

I did the same trick with the CF rod over the elevator wire rod.JB Welded in the tube and on both ends.. I used ballinks in place of the clevises supplied at the flap horn for both belcrank rod and elevator rod. I used the z bend end on the belcrank itself, and a z-bend on the elevator horn itself.The leadout connections looked fine on both ends. I also recommend the tank thats specially built for this model; it fits like a glove.

I haven't seen any Brodak ARFs fail. Lots of them are flying in our club. To my knowledge all the controls are stock. Only hinges have been replaced. Some airplanes have flown for a number of seasons. Are we talking about competition flying and practising? Don't think so. Although many of these planes have flown in competion, they have not been subject to a serious practise regiment. Flight after flight, day after day. It's always possible to make a peek hole to check leadout condition at the belcrank. Replacing the leadouts isn't much problem. Bushing the leadouts at the belcrank is more tricky.