Jazz Hands - apart from all the other problems, you can be assured that spatial disorientation was a major part of this accident. The initial pitch up would have been misconstrued by a stressed and distracted pilot handflying in IMC/Storm as both acceleration and pitch down ( somatogravic via decelleration), with the persistence of pitch up commands the likley result in the absence a contribution from instrument scan.
Not knowing which raw data to trust, of which the attitude indicator and the altidude indicator were I presume the most trustworthy, and which stall warning to trust, must have been horrifying..
A best guess approach on known cruise setting perhaps with a very gentle descent..