I personally prefer the new system of full finger movement.
But i hear from alot of people they would like a option to not use full finger curl but still use index controllers over vive wands. Or they would like to still be able to use the Track pad for gestures while still having finger tracking.
So adding a toggle or option to settings to switch between Finger curl or (Classic controls Aka 2019.2.2 controls ..Vive wand emulation)
Another Idea would be The toggle would switch the track pad to use gestures on the track pad and fully using the thumb, but that your fingers are always being tracked from the index no matter the mode
Would be nice for those users who just want to use index as normal controllers as replacements for their vive wands.