The 'bus looks to be a very well designed jet, or you couldn't have a "deep" stall, or a deep stall, for over 3 minutes without going into a spin or worse.
That crossed my mind too, a long [stable]descent
without lateral divergence or serious oscillatons
Even Airbus might not have credited that degree of spin-resistance... just needed a
giant hand to tilt it down again and a PIC to let that stick alone....
It doesn't condemn sidesticks out of hand, but it certainly does their reputation no favours, especially since their detractors have been saying this sort of thing for years; about immediate, indisputable visual & mechanical position feedback. Feel would also be a good deal more intuitive (to the hands rather than the odd finger, whether recently blood blistered at home doing DIY or not).
Fact is, however small or large part of this sequence the physical pitch control device is... it
did happen (stick held back) and
is relevant.
Now the Captain of DH 121 Trident BEA 548, may well have fought the stick (shaker) all the way down, indeed it was soon switched off, but that was not a long descent, thankfully just a few tens of seconds... so we'll hopefully not make comparison here..