Also worth noting: nothing in the Lieberman bill that this EO is patterned on creates enforcement mechanisms for IP and copyright enforcement, or for collecting customer information from ISPs. Of course, neither did the GOP's CISPA bill. That's because neither regulatory effort is about user information.
The problems both of these ill-conceived bills are addressing are simple.
Problem 1: There is no coherent strategy in the (vast, sprawling, chaotic) federal government, which is the largest IT operator in probably the world. Every agency does something slightly different. This means (a) nobody is doing exactly the right thing (usually, they aren't doing anything close to the right thing) and (b) it is prohibitively difficult to introduce new technology to help fix things, because everyone you'd get to buy it has a different set of hoops to jump through.
Problem 2: If you were a foreign adversary who wanted to cripple the US with electronic attacks, you probably wouldn't bother hitting government IT systems. Instead, you'd go for something like the power grid, or a trading exchange. Those systems are privately operated, and so nothing the government does to try to track, monitor, or deflect online attacks can benefit them.