Everything with Hermes remains the same because those events were set in motion before the WoL's arrival. The likelihood that Meteion fled/joined her sisters rather than ever disclosing the report to Hermes is probable, so he's none the wiser about the Song of Oblivion and still gets recruited to the Convocation possibly spurred on by her disappearance.

It's Venat's actions that become questionable, especially as without the WoL it's 1) unlikely she would've heard Meteion's report and been triggered by hearing about Deka-hepta and 2) she'd have no idea the Final Days were dynamis based. Given these were her two primary reasons given in the Q&A for the sundering, well... Not to mention we don't know if she could've conceived of the sundering as a means of defeating Zodiark without the WoL telling her about it.