While the Channel Properties dialog is very helpful, it still has a few GUI problems.

First, the TAB order is not good. I would like to use this with strictly keypresses but the TABbing sequence means i hafta press TAB when the window opens just to get to the name field. Either the cursor should be ready in the text field or allow for an option to dictate which control has focus first.
Then clicking TAB from the name field should take to the arrow buttons so you can navigate to the next or previous channel. Alternatively, a KB shortcut would allow for Next/Previous functions so you shouldn't need to navigate to the control if you are in fact using keypresses only.

Furthermore, if i had my wish, when using the shortcut keys for navigating between channels i would keep the input focus in the same control. So, for example, if you were setting all the volumes all at once, you'd simply type in the value of the volume in its field, click the Next Channel shortcut, then type the value for the next channel, with the focus still in the volume field.

The second problem is an actual bug. When using TAB to navigate to the arrow button, and clicking Return or Space to activate the Next/Previous channel, if navigation takes you to the first or last channel, consequently disabling the appropriate Next/Previous arrow button, then the input focus gets stuck. TABbing again will not allow navigation between controls, as a matter of fact, even pressing Esc will not close the window. (Find your mouse, 'cause that's the only way you're getting anything more done.)

Another minor problem is the placement of the window. Right now it seems to center the window at the mouseclick. Often however, especially while mass-naming, i need to see what instrument i called for the channel (normally by a note i've placed in the first row) or to see what a nearby channel is named, and then i can name the channel appropriately. However, the Channel Properties window always obscures the top few rows of the PE as well as the Channel header. Since i never need any of the info in the Patterns Page header, i would opt for displaying the little window centered, but displaced upward, so that none of the dialog covers the PE or the channel headers.

There is also a general problem with activating with the middle mouse button, which this dialog needs to display it. Since i'm still in the habit of accidentally Right-clicking in the channel header to open the context menu, only to be reminded that Channel Rename has now been removed, there's no graceful way to close the c-menu and open the Channel Properties dialog. If you Left-click on the channel header (to close the c-menu), the channel is muted. If you Right-click again in the channel header, this does not solve the problem. And middle-clicking keeps the c-menu open and tries to navigate the PE. You can Left-click in the PE to close the C-menu and start over, but this is stepping beckwards in workflow.
If i had to fix this problem, i would check the middle-button trap to see if a contextual menu is open and either close the menu or ignore the Middle-click. Plus, i would add "Show Channel Properties" in the channel header contextual menu.
Also consider deleting the channel header contextual menu altogether. Many of the menu items can go into the Channel Properties window, and the rest can be put into the PE contextual menu (which can be used for multiple setting when more than one channel is selected).

The Channel Properties utility window is a great idea but just needs a few tweaks to make it as ergonomic for KB users as well as mouse users.