Some folks like a weighted shifter to help smooth shifting; the G56 is already so easy to shift that it's not required, IMO.
The G56's ball-detent shifter base is well-designed and works great, so there's no point in improving it... however, the G-Ripper's gate spacing & throw reduction markedly improves shifting.
2005.5 trucks were the only ones that had the 1-pc. shifter; all others - including service replacements - are the 2pc. version that the short-throw shifter is designed to work with.
We can modify 1-pc. shifters to G-Ripper specs in the shop (same day service). IIRC the dealer wants close to $300 for the 2-pc. base.