Originally Posted by
Facanh
I enjoy riding my bike.
I don't want aluminum, I want a lugged steel frame.
You belong here. Velkommen
I'm not familiar with Aelle at all. I can vouch for SL and SLX not being noodles, but not sure your size.
Some 60+ cm frames can be a might flexible, no matter what, even in carbon. (which is why Specialized re-did the Tarmac, again)
My 56cm versions had/have little flex. They are not as stiff as carbon, or even modern steel, but they don't ride as you described.
They ride like polished silk.
I don't think it's a frame issue. Try swapping in some tight wheels and see what happens.