I am certainly no expert on ship construction using the Starship rules, but IIRC, we are talking about a size 1 craft here (structure 10), right? And in an other thread I read that the most powerful weapons allowed on such a small ship, according to Starships, are type IV phasers.
Even without those rulings your version seems too powerful to me. 14/3 shields on a shuttle?
Just my uneducated impression. If you have any sources backing your design, please let me know.
“Worried? I’m scared to death. But I’ll be damned if I’m going to let them change the way I live my life.” - Joseph Sisko - Paradise Lost