Before there was loss of situational awareness of nose attitude, there was loss of situational awareness of altitude.
It is unimaginable to me that anyone who thinks they are a competent IFR capable pilot could completely lose the bubble on this, yet both PF and PNF allowed the altitude to get completely away from them and made almost no effort to put the aircraft on altitude. With the gain in potential energy came a loss of kinetic energy and this finally led to a stall.
The only thing that makes sense is that the roll problems were so concerning, that both pilots concentrated on that to the exclusion of their altitude scans.
