https://steamcommunity.com/sharedfiles/filedetails/?id=1508356684
Updates to EV3
Knuckles EV3 is the result of iterating and improving upon the EV2 prototype. The team has worked hard to improve usability, fit and finish, and consistency across all units.
Strap
- Strap adjustment markings have been added to the top plate
- Strap rivet is thinner and no longer interferes with the wing
- Drawstring is now shorter
Trigger
- Trigger spring is now stronger
- Improved Trigger assembly and reliability
System Button
- The System button has been recessed slightly to avoid accidental presses
Grip FSR
- Grip FSRs (force sensors) more consistent from unit to unit
Battery Life
- Higher efficiency sensors increase battery life by 2 hours
- Players can now expect 7-8 hours of playtime per charge
Other
- LED light mixing improved
- USB port has been recessed, making it easier to connect the charge / data cable
- Improved fit and finish
- Improved reliability
Sounds like they are close to finalising the product. While probably 2019, what chance before the end of the year.
I still have concern over the trackpad and it's redundancy with older games that utilize the direction click. Going forward though, it opens up far great interactivity, valve have been holding these long enough to get them to be their latest innovating game changer, I think.