Rather than calling for backdoors, or secret rooms, this law explicitly prevents civil lawsuits or criminal prosecution for companies that refuse to install backdoors or use end to end encryption that they cannot crack.
I'm not really sure what the EFF is unhappy with about this act, since their complaints don't seem to be reflected in the text.
From the act:
CYBERSECURITY PROTECTIONS DO NOT GIVE RISE TO LIABILITY.—Notwithstanding paragraph (6), a provider of an interactive computer service shall not be deemed to be in violation of section 2252 or 2252A of title 18, United States Code, for the purposes of subparagraph (A) of such paragraph (6), and shall not otherwise be subject to any charge in a criminal prosecution under State law under subparagraph (B) of such paragraph (6), or any claim in a civil action under State law under subparagraph (C) of such paragraph (6), because the provider—
“(A) utilizes full end-to-end encrypted messaging services, device encryption, or other encryption services;
“(B) does not possess the information necessary to decrypt a communication; or
“(C) fails to take an action that would otherwise undermine the ability of the provider to offer full end-to-end encrypted messaging services, device encryption, or other encryption services.”.