Small bug - this one existing pre-migration also. The CX website still can't tell the difference between full redemption and upgrade bookings.
I just upgraded a set of flights from Y (M class) to T, and the system is showing zero Asia Miles, which is of course wrong.
I'm sure that they could fix it, because the mileage display is smart enough to show double mileage promotions as accruing double miles, so surely it could be programmed to show T upgrade redemptions as earning Y miles instead of zero miles.