I get slight toe overlap when running 2.2’s, but I had the same on my checkpoint and it’s never bothered me. Par for the course with size 47 shoes. The seat tube angle just depends on fit. And the stated seat tube angle on a seigla can be misleading since the seat tube isn’t aligned with the bottom bracket. Similar to most mtb geometry, the effective seat tube angle depends on seat height. If you have a ton of post showing, it’s slacker than what the specs say, if you have minimal seat post, it’s steeper. At around 6’, I could ride a medium or large seigla and choose the large to get a little more stack and steeper effective seat tube. I can almost get by with a regular setback post, but ended up going with a zero setback post and have plenty of room to push further forward.
Agree on the aero concerns, I don’t think Lauf has invested much there. That said, the only data I’ve seen on Lauf in the wind tunnel was when Silca tested the Lauf fork against a “normal” gravel fork and the Lauf suspension fork was measurably more aero. They didn’t understand why and it might have been a weird anomaly, but it’s probably not aerodynamically terrible. I haven’t seen any testing on the frame.