Because of the design changes and downgrading of the tech...

You get a newer cheaper and sucky looking crank, bottom bracket, and in some cases a front derailleur and chain. Kid you not - because they know that everything needs to match and be clean.

Have dealt with two of these in just the last 6 months.

Shimano has no further liability so long as they replace 'em when notified - and record the transaction. They've already paid a fine to the CPSC in lieu of liability so long as they honor the conditions agreed too. "Inc." has it's privileges.