@KleineAnfange - fair enough on Shimano. The cadence ceiling is a real quirk that catches people out, and your Fazua concern about development longevity applies to newer/smaller motor platforms generally - sensible filter.
So narrowing to
Avinox M2S and
Bosch Gen 5 (since you're not ruling that out for others' bikes, just not buying it yourself) for the "rides light" character:
The
Avinox M2S (
motor page) measured 1462W on independent dyno - the delivery is notably progressive rather than aggressive, which is what you want for that light, responsive feel. The
Amflow PX Carbon at 21.4kg with 700Wh is probably the purest expression of that motor in a light-handling package right now.
Bikes worth adding to your list using M2S: •
Phase Avinox Factory - 160/160mm, 800Wh, £8,750 - relatively new to market
•
Megamo Reason Gen 2 - 160mm travel, 800Wh, Avinox M2S - worth investigating, though I'd verify current availability and independent ride impressions before committing
The SC Vala and Orbea Wild you listed are confirmed Bosch Gen 5 (current stock) - different character from M2S, smoother/more hushed but less raw feedback.
One genuine gap in your list: the
Pivot Shuttle LT - do you know which motor version you're looking at? That's changed across model years and I'd want to confirm the current spec before comparing it on motor character.