I really miss a lot the function of whole group pitch it made things so faster while choppin things.
Also it was so good when fixed velocity was 127 by default.
On the hardware, you hold the group button and use the 4d encoder (while in tune mode) to change tune on the entire group. In the software, if you select everything, changing tune in 1 sampler will also change the others.
I'm not sure how it was implemented in the old software, but it's still an option.
For the second issue, you can create a template, set the fix vel to 127, save it, and make sure that in the preferences Maschine loads your template when creating a new project. Set the file to read-only so you don't accidentally overwrite it.
Preciate you bro