They're using her stupid Other M design, but they're trying to make it less stupid by saying that the stupid heels are actually stupid rocket heels. They shouldn't have changed it to the Other M design in the first place, because, as we've already established, the Other M design is extremely stupid.
And the 'rocket heels' defense is pretty weak anyway--if she needs a rocket boost from her feet, I'm sure there's a more practical solution than "put them in the stiletto of the least combat-practical footwear design ever". Like, just have the boosters on the bottoms of her regular shoes, or behind her ankles.