Just wanted to post here to follow up in case anyone was in a similar boat as me:
- Bought the iBlasion case on Amazon for the 15" tbMBP
- Then ditched shell for the Incase ICON slim bag
- Just attached the new Incase Dots Hard Shell for 15" tbMBP
The Incase hard shell is leaps and bounds better than the iBlasion one, with the most important element being that it is significantly lighter. The iBlasion has a better feel - though that feel is certainly going to peel off with use - but the Incase case is incredibly light and thin.
The Incase ICON slim sleeve was also really nice, but for my usage I felt a hard shell was better. Plus, the hard shell dulls the sound of typing on a hard surface (helpful for class/library/open headphones/etc.)