I 100% agree and think the 10B should be skipped for now. It can come later but it’s not a substantial enough upgrade over the 10A to compete with the Rafale EF2K and SU-30sm
Or later down the line add it as an premium like the FA18 or israeli F16 (the basic J-10B that is)
Issue is it seem to carry something which is now released, because you can see there is a space and a mechanism under the ‘pod’ thing which likely was not meant to be like that.
The only benefit I can see is the ability to fit a larger antenna (And perhaps slightly higher reliability by eliminating the mechanical system, but those should be quite reliable anyways).
As far as WT goes, I would rather take the smaller antenna on a swivel …
Things like Irbis-E get 240 deg (±120)
And CAPTOR-E should be like 200 deg (±100)
Which allows you to stay in the notch and still look for targets and launch missiles at them …
Now this thing looks like it has around 30 deg tilt in elevation
So it they assume 60 deg electronic steering it will get +90 in elevation and if they assume 70 deg steering it will get 100 deg in elevation
Which if they implement correct could allow you to roll 90 deg and use your elevation to find targets off boresight (Though it will be difficult to maintain the roll with RB controls, without some sort of manual roll control mode like helicopters get).
IIRCm only Captor, Raven and Irbis (anyway semi-PESA) have mechanical scan. But every other country like US, China, France, Korea (but IIRC US-made radar) use fixed aesa radar.