I've performed the first upgrades on my bike. I've changed the pedals for the Look Kéo Classic
Look Keo Classic
and I've added the Oval A710 extension bars.
Oval A710 aero bars
The bike seems decently equipped to me now, I don't plan to change any more parts in a near future.
Following a fall due to the pedals, I also had to change the rear derailleur hanger.

Ultra minor bike changes.