Sure, she can double up your damage, but if that's your plan, there are a ton of options available
Its other abilities are Fools!, which lets you put five character cards from your discard pile on the bottom of your deck to Shift the card for free
Meanwhile Coral Colony (and the slightly inferior Doorkeeper) are much easier to work into various decklists as a nice blocker and mana-sink mill source
Inspiring Leader gives your tokens a +2/+2 bump, but you need to control your commander to make it effective
I would like to argue, however, that Island Sanctuary is actually better now, then it ever was
A truly great payoff for this style is Kappa Cannoneer