I didn't start learning with Cryengine 5 but I do agree this update is pretty stable and has some nice features.Schematyc is a big one for me.
I am not a programmer and the ability to flush a full game out without learning programming is very appealing.
Highpass adjustment in the material editor is amazing.
Soft Depth Test is awesome.
Object integration into terrain wonderful.
FBX import super useful.
Lastly the load times and stability are much better than 5.3 and previous versions.
I started learning cryengine with cryengine V and this update is such a breath of fresh air. I love it. Keep up the good work people!