If everything is working, then you might choose to do nothing.
The v3 mod with the resistor change should improve the behavior with some strings, and also allow longer lead wires (before the first pixel). Some have seen flakiness with the v1 and v2. v3 is intended to improve the situation.
However, RJ plans to make changes to fix and improve the v3 and v4 controllers, but not the v1 and v2. The changes to support additional color orders (BGR, BRG, GRB, GBR, RBG, rgb) will be available for v3, v4 and Zeus.
If you are happy with your strings -- the changes won't make things any better.
Grouping options might be another reason to have v3... not sure about that.