That and the fact that 90% of the wasteland seemed oblivious to the fact the water was purified.. or at least didn't give a damn about it.
That, and not to mention the story of Broken Steel was extremely linear.
"ENCLAVE R BAD, KEEL ENCLAVE, YOU ARE WINRAR"
I mean, why couldn't you join up with the Enclave from the start if you put the modified FEV in the water. Instead, you start with the BoS who, instead of killing you for what you just did, are only a little bit pissed off and want you to fight against a faction you just helped. Seems like the BoS out east really don't have a brain... :prod: