Adding more cupcakes? (Patreon)

I was thinking of adding more cupcake tiers ($10) since it seems to be my most popular tier. However, with the loot boxes, this would be more work for me so there would need to be a trade off:

No more guaranteed full-resolution files.

I'm already proving to be really bad at providing them in these first 2 months. I was thinking that every couple of months I may upload a zip file that has all the work thus-far and that would be accessible to all $5+ patrons after a certain period? But that way it's less pressure and I can focus more on what I currently offer:
- suggestion focused artwork
- personal art
- tutorials
- loot boxes
- animation (it's comin!)

All in all adding more loot boxes would be too overwhelming without foregoing something else. So what would you guys rather have?