TouchID is a big increase in security in fact. Ultimately, its the PIN/passcode that locks the device. If you use TouchID, then you can set a very long PIN that would take forever to bruteforce...

No they cant - They can push a new iOS to the device but all the user data is still encrypted by the users PIn/Key. The request from the FBI is that Apple create an iOS version for them that will allow unlimited, quick PIN tries by a computer so they can brute force the PIN. There’s no way for Apple or FBI to…