ECPA is actually fairly strict. It would be both illegal and tortious for Google to, for example, share the entire contents of your Gmail archives with the MPAA, currently. But after CISPA passes, it would be neither illegal nor a tort.
As for the government, it overturns and eliminates warrant/certification requirements for a wide swath of purposes. Under ECPA, a communications provider could give data to the government only if it reasonably believed it was immediately necessary to prevent death or serious injury. Under CISPA, any internet entity can give any data to the government OR ANY OTHER ENTITY for almost any sort of reason - "ensuring the integrity" of any internet service cuts a giant, giant swath. And specifically enumerated in CISPA, but entirely absent from ECPA, are that anything relating to antipiracy efforts is also covered.
You seem to have a very confused idea about ECPA-1986 if you think it has much in common with CISPA-2012. To the extent that they overlap, CISPA is intended to overrule protections that ECPA provided.