Didn't know about pitch follower! It seems super cool considering that I would like to integrate the sound of my piano with a voice or two in my rack, so I'll add a disting for sure. Sampler is something that I'm considering for the future, I really like morphagene and 4ms DLD that can also loop.
Regarding the mic I thought that maybe I could use a mic connected to the mixer and send the piano signal from there to my modular through the FX send. The output from the modular would go in the FX return, so I would just need a little preamp in my case. I don't know if I explained myself well, do you see any problem in my idea that I'm too noob to see?
Anyway, thank you for your reply and your hints!