Ghost Town, when bounced, serves as another fodder card in your hand you can trade in if need be when using Scroll Rack
Outside of that context, it likely replaces Thran Dynamo in most shells that play it, a rapidly-shrinking niche but one that persists nonetheless
In particular, as is often the case with modern sets, there are a lot of new toys for Commander here
We started with White and Blue
A 4/4 with flying whose opening move is to destroy one of your opponents creatures is great, and its +1/+1 counter ability is just another boost to your bloodsucking army
There's never a moment when creatures will have their abilities on the battlefield, so it even beats creatures with powerful enters-the-battlefield abilities