Strictly RAW, does Desna's Shooting Star add full Charisma bonus with Two-Weapon Fighting?

Question

Desna's Shooting Star is a Divine Fighting Technique. Here is what it does:

You can add your Charisma bonus to attack rolls and damage rolls when wielding a starknife. If you do so, you don’t modify attack rolls and damage rolls with your starknife with your Strength modifier, your Dexterity modifier (if you have Weapon Finesse), or any other ability score (if you have an ability that allows you to modify attack rolls and damage rolls with that ability score).

For comparison, here is another power that allows to use another Ability Score instead of Strength:

Finesse Training (Ex): At 1st level, a rogue gains Weapon Finesse as a bonus feat. In addition, starting at 3rd level, she can select any one type of weapon that can be used with Weapon Finesse (such as rapiers or daggers). Once this choice is made, it cannot be changed. Whenever she makes a successful melee attack with the selected weapon, she adds her Dexterity modifier instead of her Strength modifier to the damage roll. If any effect would prevent the rogue from adding her Strength modifier to the damage roll, she does not add her Dexterity modifier. The rogue can select a second weapon at 11th level and a third at 19th level.

Because Desna's Shooting Star just adds Charisma and doesn't add Strength instead of replacing Charisma with Strength, I believe that it wouldn't be halved when using Two-Weapon Fighting. Thus, if my Charisma is 22, I would hit for 1d4+6 with each of my Starknives, and I would hit for the same with one of those.

Is it correct under a strict RAW approach?

Answer 1

By strict (and silly) RAW, yes.

But it is even worse than that.

In addition to the point you noted, there is also this:

You can add your Charisma bonus to attack rolls and damage rolls when wielding a starknife.

Another consequence of reading this is as RAW that you don't add your Charisma to the attacks made using the Starknife - you add your charisma to all attack rolls and all damage rolls made while wielding it. That means that you can blast a fireball or bonk your enemies with a club while holding a starknife on your other hand and get the bonus anyway.

More so,

If you do so, you don’t modify attack rolls and damage rolls with your starknife with your Strength modifier, your Dexterity modifier (if you have Weapon Finesse), or any other ability score (if you have an ability that allows you to modify attack rolls and damage rolls with that ability score).

It's only the attacks made with the starknife that don't get the STR/DEX bonus. All other weapons still do.

Under a reasonable GM, probably no.

To me - and most other GMs, I believe - this feat looks a lot like it should work just as Finesse Training, and a such should use similar wording instead of the current raw-mess, replacing STR or DEX by Char for the damage and attack rolls made while attacking with a starknife, and nothing else.