Now that you mentioned it, I’ve been feeling pretty happy, not really missing out on phantom braking and rain sensors experience on AP2 and above.
Only wished Tesla turned back the EU imposed restrictions on AP that also plagues AP1.
If I were to guess, seeing how Tesla is a fan of iterations (Agile) I would not be surprised to see it coming in a later update.
As Atom is another platform on S/X, with a secondary display (IC screen) to manage, I would indeed bet that blind spot camera will be displayed on the IC, instead of the MCU, where it sure makes more sense.