I believe Darth Sidious just got hoodwinked. By a 14-year-old Queen that he thought he could manipulate into doing whatever he wanted! BAM!
When Amidala leaves Coruscant to go back to her planet, we see Palpatine have this fleeting satisfactory grin on his face. Oh yes, he wants her to go back because it will be easier to kidnap her and force her to sign the treaty so that the Federation has complete control over the system.
But when he says this is an “unexpected move for her”, did he think that she had gone into hiding (which I believe the doofus’s from the Federation could have believed) or did he know that she was going to try to enlist the Gungan’s help?
My guess would be that he, either through the Force or deduction of reasoning, realized that she was going to try to ally herself with the Gungan army. Clearly this caused some concern because he told Darth Maul to be “mindful”. Mindful of her intentions? Mindful of the Force? Mindful to not strike so quickly?
I just love that line, “This is an unexpected move for her. It’s too aggressive.” Because how many times does Palpatine end up kind of surprised? Fabulous. Way to go, Amidala, way to go.
INTERIOR: NABOO PALACE – THRONE ROOM – DAY
NUTE, RUNE, and DARTH MAUL walk with a hologram of DARTH SIDIOUS.
NUTE: …we’ve sent out patrols. We’ve already located their starship in the swamp…. It won’t be long, My Lord.
DARTH SIDIOUS: This is an unexpected move for her. It’s too aggressive…Lord Maul, be mindful.
DARTH MAUL: Yes, my Master.
DARTH SIDIOUS: Be patient… Let them make the first move.