I also wrestled with the idea of a pickguard on my PS56ce. I bought a temporary clear one from Taylor (through MusiciansFriend) that has been on the guitar only once...I didn't like it.
Plan B...I practiced (and practiced...and practiced) being more precise in my flat-picking and using only about 1/8'' of exposed pick. It's been over 18 months and no 'Trigger', even with 'spirited' strumming.
Only two other people have played this guitar since my ownership started. It did make me a little nervous, so that was the only drawback of having no pickguard.