I 100% agree on Hammerhead... As a matter of fact, I was criticized, for actually criticizing, the last Hammerhead.
Is he a cool sculpt? No doubt.
Is he a good Cantina alien though? Since he was sitting, I say no. And to be honest I think knees should've been given whether sitting or standing simply because he's an "action" figure, implying that he's poseable, and blah blah blah.

But Hammerhead I'm all for a retool.
On Scott's point, I'm all-in on a new Leia headsculpt and arms... VOTC Leia lacked. She was cool at the time somewhat, but who wouldn't dig better poseable arms and a better likeness on her? She spends all of ANH in that one outfit pretty much. She's running around like a jackwagon shooting everyone in sight. She's a badass bitch!
And she's got a sub-par figure to show for it.
Ceremoney Luke is a great one too... I liked what Hasbro wasaiming for in 2007. The figure's so close, but so far. I'd probably be content just to get him with the color skin that makes him look reasonably healthy. A new headsculpt wouldn't hurt either though.
How long have we gotten AOTC style Clones now, but not ones with removable helmets and ball-jointed hips, in the basic line? Much less repaints to the various officers? I'm in on buying those. Maybe not in the mass bulk I used to, but I would buy a red, yellow, blue, green, and some plain white versions that had all those upgrades.
Here's a thought... And it's obscurity.
The Mon Calamari Officer... Now that Ackbar got an update, do you care to see that guy get a repaint of Ackbar, rocking the Keds of course, and the helmet? I'd buy him. He's stretching things a bit, but again this is a figure with little investment, to turn out something new. I'd buy him.
And if the last Prune Face doesn't yield us an all-new Prune face by slapping an eyepatch on him, then Hasbro can eat a Green Weenie.