Not sure I buy the zoom climb, looks to me like the plane was already breaking up as it went to the scene of the accident.
I would agree. 30,000 fpm climb doesn't seem credible given weight (momentum) and aerodynamic limits. It also doesn't correlate with the last transmitted ADS-B vertical rate. The last couple ADS-B data points should probably be discarded as outliers -- we may be seeing post-impact effects.