One-shot shift = after tapping, the next key you press is shifted? That does seem useful.
I also liked QMK's "caps word" feature. It's like CapsLock, but only for UNDERSCORED_WORDS. (i.e. the keyboard returns to non-CapsLock after typing a non-word letter, like space/esc/tab/etc.).
Exactly. I also use capsword to capitalize more than a single character (autoshift gets old very quickly otherwise).
I also have one-shot combos for ctrl on the home-row, so to do Ctrl-N for instance I can just tap ring + middle finger on the home-row followed by N. Super convenient. (You can hold one-shot modifiers to act like a regular one too.)
I personally use auto-shift (long press for shift) on my 34 key layout, but I think most would prefer the one-shot shift.