Not terribly long after the first one, SteamDB has spotted another update for the game:
Size is ~40 MB (with Workshop Tools installed). Although extremely unlikely, more info will be edited in if it does become available.
Tinker's Defense Matrix has been reverted
The cooldown of Naga Siren's Mirror Image was inadvertently changed to 40/30/30/25 when 7.30d was released last night, as described in the notes (which was meant to be down from 40/36/32/28)
And in a continuing theme of changes that were forgotten about in implementation…
Source: https://www.reddit.com/r/DotA2/comments/pvy0pa/dota_2_update_2_for_early_92621/
