… instead of having to open the Marker Editor window.
And the ability to set individual colours for each…!? [EDIT - SOLVED; see below.!]
(I know, its crazy stuff…)
+1 on the double click renaming idea.
As for individual colors… this can be done now using the color pallet.
Regards. 
Double clicking a marker moves the cursor to that marker. You don’t need to open the Marker Editor window, there is the description field in the info line.
Thanks to both…
Ok, yes - that Info Line idea helps; I don’t have it visible all the time, so would need the extra step [CTRL+I] to toggle it open/closed. Still a tad clunky, when I’d prefer a quick dble-click with a modifier(?) that would allow editing the text label right there and then…?
(Rambling mode = ON; I mean, its just what’s done in almost every other software package of the last ten/fifteen years or more - anyone, coming across a text label somewhere in a software app, ‘understands’ that a dble-click is what usually allows you to get in there and edit it; its become a norm, a standard thing… about time Cubase caught up. Rambling mode = OFF)
Having idle hands, I came up with another way, still a tad clunky;
drag the spacing handles at the top of the column headers in the Marker Tracks inspector panel, so that the ‘Description’ column is visible - as opposed to the default Index ID and Timeline position, with NO ability to scroll across to reach stuff out of view - then each Marker’s text is editable right there with a dble-click. Downside, it needs the Marker Track to be selected, but at least the column headers do stay in place once set.
I’ll post a screengrab for clarity.
Second… @Prock; got it now, thanks.! Select, and use the Toolbar Colour Palette button… Goodness, how long has that been there…?! 
Bob
You can get naming to cue automatically in the marker window when adding a marker.
I tried the rearranging of the headings thing but if I select a different track then go back to the Marker Track the headings revert back to default. Issues Forum time!!
Sure - but I’m prone to changing my mind a bit… others around me too… Different labels for the same parts can make better sense later in the session. Yes, I could add another whole new Marker Track I guess… with new appropriate labels… but…
But this is all just diluting from my original request.
You’re kidding me… I was just having at it for an hour or so yesterday and the headings stayed as I set them; opened different sessions/projects, re-booted Cubase, etc… no probs…
I’ve just opened a project from yesterday too - and the headings are as I left them… (happy.!) 
Preferences trash time perhaps…?
Good question. I’m not sure really. Probably from the Marker Track get go.
Still a big +1 for the double click renaming request.
Regards