Worth it to balance rotating assembly?

Yes neutral balance it, while you're at it have the rods rebuilt with new bolts & nuts. I also would have it main line honed with new bolts or studs.
Both will make the neutral balance last with no chance for irregular wear to begin.
Balancing only costs a few 100 bucks.
That's me spending your money, but I do it at work & see the difference.
Good luck