Currently the sneak attack says:
If you Strike a flat-footed creature with an agile or finesse melee weapon, an agile or finesse unarmed attack, or a ranged attack, you deal 1d6 extra precision damage. For a ranged attack with a thrown weapon, that weapon must also be agile or finesse.
Then we have the Bludgeoner Rogue Feat.
You make brutal bludgeoning attacks that daze your foes. You can deal sneak attack damage with one-handed weapons of the club and mace groups even if they don't have the agile or finesse trait. When you Strike with that weapon and critically succeed at the attack roll, you gain the following enhancement.
Enhancement The target is slowed 1 until the end of your next turn.
Since even in the core playtest we are adding weapons to what the rogue can use Sneak Attack with, I would recommend you create a classification for these weapons and change the descriptions. That will make it easier to add other feats that expand the weapons and allow you to cleanly specify when something is limited to weapons that a rogue can use to Sneak Attack with.
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I assume that the weapons from Bludgeoner are not supposed to get Dex to Damage. The way things are currently worded they wouldn’t get it.
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If a Rogue takes Bludgeoner, should their proficiency in those weapons increase to Expert at 13th level when they get Weapon Tricks? Currently the way it is worded they wouldn’t get that unless the weapon was also a simple weapon.
I would suggest you expand this to include any weapons they can Sneak Attack with. That way it would include the weapons from Bludgeoner and any future weapons you may add.