I have a similar opinion. I really didn't like the samples player and the granular engine. I'll absolutely ignore using this engine.
What I like is the rest. The VA, Wavetable and harmonic engines. I think I will use the VA engine mainly with the other two to give some uniqueness to the sounds.
I haven't delve into making my sounds yet, but I believe the easy workflow and the friendly GUI might make the tasks easier. Can it do aggressive sounds like Serum? I don't know, maybe. I haven't heard many modern dance presets either. However, in theory nothing is holding Pigments from making any sound. It's a power synth like Zebra. So, only time can tell what use people would mostly use it for.
I recently played with Thorn, and I prefer Thorn in leads, bass and plucks sound. Pigments is definitely superior in pads, but this may change when I know those synths better.