Ah hello my soulmate, I am in the same situation! I need higher stack and shorter reach in 56 size, currently riding Scott Addict RC 2020 with spacers...
I had Aethos and love light frames (would love to buy the new Scott Addict RC, but it's even more agressive geo...)
The 2026 endurance Scott Addict is 780g in M/54... it should not be too expensive, sadly they don't sell it as frameset...