Could be handy to include noise maker into the replay last action feature.
This could be handy if you just want to just mask a little part of your model ,and then while still viewing your model.
Apply a sufuce mask, so you can quickly mask the part that you just want to affect the mask.
And then while still have a mask active, your second surfuce mask will only do a masking on the unmasked part.
I use the moving brush a lot, And sometimes I invert surfaces when I pull the surface to much.
When the surface is inverted like that and have multiple subtool, the alt clicking on the subtool to select it is really a problem, on the inverted surface.
It could be stretching of poly’s, and the vertex problem because of it, I’m not sure.
Did some tests and it’s just the vertex that is the problem because of the extreme stretching.
Could be cool to also include the surface into the selection process.
Made a macro, but this could be a nice feature. For stuff like this:
//ZBRUSH MACRO - Recorded in ZBrush version 4.6
[IButton,???,“Press to run this macro. Macros can be aborted by pressing the ëescí key.”,
[IShowActions,0]
[IConfig,4.6]
[IPress,Transform:Snapshot]
[IPress,Tool:SubTool:Duplicate]
]
For when you make a snapshot and want to have it duplicated in your subtool menu.
ps: havent tested it yet.
Tested it and it works
I only use the move brush to warp the head, and made a snapshot every time)
Nice to hotkey it to a Shift Alt S
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If you have a low poly model,with only tri’s,
Would be nice to include them into the binding process.
Now I have to convert them to quads, to make it work.
Would be cool to include the append feature with lightbox compactibility.
To directly append the tool into your project.
Or maybe a clone feature below the icon to get it in the active tool window.
So this could be cool to start out with a curve line, then that will be the spring mechanism and it will append the transpose line to it so that will be rigid, the curve will have a spring like behavior and the rest will have normal transpose line functionality.
So the start point of the curve will stay in place, the rest will be adjustible through the string settings, and the rest will be just like the transposeline.
See Picture:
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For when you have a black imageplane , or a mesh that you have Z Projected,
That is dark, when you want to clip in the dark spots the shadow part of the clip line in hard to see.
Could be cool to have it notice the dark spots, and then will invert the dark shadow line.
Ok this could be handy:
To have axes constrains with the move brush.
For stuff like this when you are at an angel with a imageplane loaded, and you want to move in just 2 or 1 direction.
I tried the normale axes constrain but it is non compatible with the move brush.
See picture:
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Would be cool to have pixols smooth, with the Shift button.
Coold be handy because there similar
Now if you use the trim brush on a plane the surface get the tesselated topology when you trim it.
You could just hide and delete hidden, or slice it.
But could be cool to have a quad surface option 2.
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I love the frame mesh function,
But because of dense meshes the curve point will get this error (to many curves)
Could be cool to have a setting that will tone down the curve steps.
Maybe a popup window right after the error would be cool.
And a setting in the stroke menu.
NVM 
Curve Smoothness is the setting that fixes the problem.
Never used that one it’s awesome.
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Could be handy to have it also include flat surfaces. (multiple)
Run before your failed operation. Tool:Geometry:Delete:D.Delete Loops, could help.
Now I have problems when I go to a side view, make a transpose line then revert back to the stored view.
The transpose line dissapears.
Thanks Doug! 
small_orange_diamond
Would be super if you have multiple tools in one subtools, to have multiple pivots for them.
So you could scale them all, now only the inflate mod works for it to keep them in one place.
This could be handy to have a button that will always put the transpose line in the center of mass.
For when you want to silhouette with a light background and have a dark silhouette.
You could just invert everything , but it could be a handy feature.