At level 18: 2210 health, 84.6 armor (+5 from passive), 53.4 magic resist (+5 from passive)

+1000 health +50 armor +80 magic resist
Total: ~3200 health, ~140 armor, ~140 magic resist
Every 1 armor and MR is a 1% increase to effective health.
She has 7680 effective health (3200 x 2.4)
With 3550 health and 140 armor and MR, she ends up having 8520 effective health
With 3200 health and 175 armor and MR, she ends up having 8800 effective health
With just 2 dragons on her team:
3550 health and 150 armor and MR, she ends up having 8875 effective health
SO BASICALLY, if your team can get TWO dragons, she ends up with a net equal effective health AND an uninterrupted escape/engage.
Just saying, there is no reason to complain like, AT ALL, because these buffs are substantial for the trade-off. Yeah her human form is a little weaker, but do you know how many Shyvana ults I have blocked as a support? Her win rate will skyrocket if you ask me. Yes it was a good change for her, but certainly the human form nerfs were appropriate.