Hi,

whats the best way to make a setup, so that I can hide Malcolms Arms and Legs for blocking? I would like to quickly hide/unhide them.

Not so easy in Maya, unfortunately. You can use isolate select, but it's a bad workflow. We'll have to do something better next time.

Would you rather see low res parts or deforming parts?

No, I will just work with unhided arms/legs.

It'd be great to get a proxy "boxy" limb mode so we can hide individual limbs. I've found that super helpful in the past.

Yes, I think that definitely should have been in there. Next version!