I am experiencing a couple of issues regarding Slashing Grace with a Swashbuckler character. I'll note them both in this ticket, but can separate them if it makes more sense for you.
Both issues happen on RC8 but do not happen on RC7.
1. Standard Swashbuckler. Cannot add Slashing Grace without adding Weapon Finesse first. Weapon Finesse should not be required, since Swashbuckler Finesse says "This ability counts as having the Weapon Finesse feat for purposes of meeting feat prerequisites.".
2. Archetype Falcata Swashbuckler (aka Rondelero Swashbuckler). Even if I add Weapon Finesse (to solve the issue above), it is not possible to add Slashing Grace. Clicking on "Add Selected" doesn't do anything and doesn't give any error/success message.
Windows 10 Home