I don't know how this applies to RGB MX Blues, but the RGB Blues on the Ducky Shine 6 (and YOTM) are the NICEST RGB blues I've ever seen. I don't know how many of you have new batches of blues/RGB Blues, but you really have to try them. They feel like a completely different manufacturer made the switch, even in comparison to the inconsistent, scratchy, fluttery click RGB Blues on the iKBC F keyboards made last year...and they also feel more tactile and bouncy than both the regular blues and greens on my Ducky Fire 69.
It's probably as close as you'll get to the feel of a buckling spring from a Cherry switch.
1) the tactile bump is more defined than before.
2) there seems to be more resistance in spring weight.
3) the feel of the switch feels more robust (pressing, recoil)
4) the click is deeper pitched and tighter, with far less flutter than older switches (Not every switch is perfect though).
It's literally night and day comparing my Shine 6 vs my iKBC F108.
The iKBC (both of them) were assembled 08/2016 according to the serial# and a stamp on the PCB, but God knows when the switches were produced on it. They're much worse than the Shine 6's blue switches, and Ducky told me that Cherry "improved their manufacturing of blues recently."