Well, it would be very nice. Currently, there are feature requests about hiding unused slots, as the technology currently exists next door, at the mixconsole. Here’s one thread for example.
There are also requests in the vein of “widening” or “word-wrapping” the inspector. There is no precedence of this tech in Cubase, so I’m guessing it’s not a request to be implemented soon.
And then, there is the mixconsole window trick on the left, if it suits you.