It's true but the lens quality make it unusable in 48MP.
I've a MP1 (and bigger stuffs also) and I made some comparisons with the DNG's of the
MA2 available. I would say the sensor is slightly better on the
MA2, mainly less noisy in chroma and the lens is slightly better on the MP1 than on the
MA2.
In photo mode, the quality on the
MA2 is decent let's say in 3k/4k format, which is not so bad. The DNG files are not usuable in 48 MP format, but starting from a 48MP reduced in 3K or 4K you can get better results in LR than the jpeg. The jpeg however is quite good.
Of course the
MP2 is much better. No comparison.
I've not checked the IQ in video, I'm more insterested by photo. I guess the
MA2 will be much better compared to the MP1 due to the lower noise in chroma and the bitrate, and closer to the
MP2. However the
MP2 works in 10b and the
MA2 in 8b only...So I think out of the box the video of the
MA2 should be very good, but the
MP2 will still better support HDR modes thanks to the 10bits, the much lower noise and the bigger pixels ( 0.8µm vs 2.4µm)
With a pixel of .8µ only, even if the optics were good the diffraction would be a problem