I'm wondering if Laezel (and Us for that matter) should be non-controllable while on the nautiloid. Here's a few reasons:
1) Seems unreasonable that she'd listen to any "shouted" commands from you. She knows what's best, right?
2) Control over her lets you take everything from her. A couple of playthroughs now I've traded my worthless armor for her Githyanki half-plate. Really good upgrade for my Githyanki wizard.
Laezel seems the type to chop off your head for merely suggesting a trade.

3) Us to a lesser extent doesn't feel right that we control it. It should be controlled by the mind flayer, not you.