[A26B]

It would bother me. You can see from the following photo of a used guide, the chain contact does lessen towards the end. Who knows how long it's been broken off & whether it's causing the wear strip to wear more, being loose on the end. My concern would be the chain eventually contacting the exposed metal in the guide & wearing the chain. Difficult to say how deep the wear is on the guide strip now with the miles on your engine & when the chain will start rubbing the guide. Bad enough with the abraded metal floating around, but a broken chain can cause alot of damage.

As I understand it, (never tried it myself) removing the balancer with the engine in the car is next to impossible & more time consuming than pulling the engine. Also, like Johnny said, you're bound to find more questionable parts to replace. Pretty hard to know just how much life is left in a chain..... new chains on worn sprockets is hard on new chains.....etc.