Hello !
Not sure where to place this post.
I have some wishes for the next Zbrush 4.5 or 5 
Would be great if you can lock the subtools in the subtools layers.A Button with a lock symbol like in photoshop would be enough so camera/objekt is not moving.Its helpfull also for The spotlight tool.Or Turnoff completly rotating on axis. Because we have some broken keyboards here in our office because objekts/camera are not lockable Not all are using Projection master.
Some grafik tablets are very inaccurately 
Multimaps exporter is always overlapping other menues and i have two open the menue most 2 times because its closing.Ok a custom userinterface solve that problem but simple press space to open that menü would help or something else.
ZBrush’s camera is orthographic, so its hard to model objekts from inside.
So would be great if it is possible to edit cameras like Angle of view Focal lenght and so on. It is possible to turn on perspective and edit focal lengh but that not really solve that problem. Try to model a tunnel or hole from inside than you understand what i mean.
Something like transfermaps would be great, than zbrush is perfekt.
You can tranfer maps in zbrush 4 i know but it works not with a simple plane like in maya.So i want not to use two tools Andy maya always is crashing and transfertool is slow and bad 
Correct me if i’m wrong
So rest is awesome.
Some things are easy to change i think