I shouldn’t really answer here because I’ve never used grease pencil and have too little experience in 3D to have my own opinion about it. But I often hear that other software is better than Blender for certain functions Substance Painter is supposed to be better at materials, ZBrush is supposed to be better at sculpting and so on. There is certainly something to this, the software costs a lot of money and they are specialized in one area Blender is the Swiss army knife, it has many functions and does a lot of things right, but in some areas it is not as strong as other software or even better than others
BUT Blender costs us nothing and it grows with time. As I said, you are certainly right with your statement, but GP may be greatly expanded in 1.2 years. In the end, I would like to say that ultimately you should try everything out and decide for yourself which way/software is better for you. I like to watch “Speedchar” from time to time, a man who creates excellent characters. He switched from ZBrush to Blender. Just as an example
