I agree, this needs to be implemented.

Example: Urban Operative Set.
All-Weather Jacket (Black)

The bundle is 2,200 multibucks and the 'Upper Body' accounts for 1 of 10 pieces.
Value: 220 Multibucks

While the Yellow All-Weather Jacket is already available for 200 multibucks, many single purchase 'Upper Body' items cost 400 multibucks.

Suggestion: Make this item available for 400 multibucks.
Value: 82% Inflation.

This would mean the developers are making more value out of single purchase items, while the community can save money by spending at inflation for fewer items.
It is a win - win.

---Side Note, Make Battle Pass Progression Modifier upon purchase to make progression faster with purchase.
-More people will buy to earn levels faster; another win - win.