(1) Gains ATK equal to its Level x 200
Shes able to Ready other Princess characters whenever she Quests too, though she cant immediately send them Questing again
Your other Vehicles might make the multiple-Vehicle issue come up, but theres no way you have to crew multiple Flagships at once
Many players are put-off by the current Forbidden & Limited List in Master Duel because its not the same as the TCG (I believe its a weird combination of the TCG and OCG) which has created some interesting deck ideas and interactions, but overall, everyone seems to be having fun
Dress Down can strip a creature of indestructibility for a turn, giving you a window to actually destroy it
If you really wanted to cover all the bases, you could add 9 more cards that, according to my research, are rarely but occasionally played competitively these days: Arrogant Wurm, Beetleback Chief, Bottle Gnomes, Fyndhorn Elves, Order of Leitbur, Order of the Ebon Hand, Portent, Shield Sphere, and Whispers of the Muse