Thank you for the reply. I'll try to answer, but I'm not sure what you mean by 'documented' improvements/growth.
A1: I got a little feedback from last cycle, mainly addressing poor writing, especially with regards to my research. I had similar feedback from my interviews. I'm getting more feedback on this writing.
A2: During last cycle I started a project which is nearing completion. I've submitted to present but I'll have to submit my primary well before I get confirmation. Some of my letter writers will update their letters, but I don't have any brand new activity. I've had a complicated year which people have suggested writing about to demonstrate "resilience", but the reality was a series of lucky and unlucky events.
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My feedback was limited but didn't mention my activities. With that said, I'm no longer actively volunteering. I had to stop tutoring due to my work schedule.
I did plan on applying to PhD programs last year, but I didn't have the money. Money is also why I didn't submit most of my secondaries last cycle.