Looks like the real issue is that the Inspector doesn't update until you refresh it by changing tabs/tracks. Both tracks get renamed the first time, but the Inspector doesn't show it immediately.
 
Definitely a molehill in the grand scheme of things.

Agreed not a massive issue, but the whole way soft synths behave when manipulating it's properties feels half baked overall. Not a great user experience.

Hmmm... I think I'd give it 97.5% baked at least.    There would have to be a lot more wrong with the implementation for me to give only half credit. And this issue seems to be more about the Inspector than about synth/track handling.

I give it 75% baked then if we are going into more detail here. Basic features like renaming and ability to select without fiddling around (as fully explained here) are a must, not a "nice to have" from my own perspective. It's not majorly broken though if you put your logic goggles (rather than your reality specs) on so that's the main thing.

Issue persisting X3E.