The batch renderer 3dsmaxcmd.exe was not well updated since it was build in 2005. It still lacks features that other applications have. And it does not even support the new state sets. .
What the commandline renderer should have:
1. Options to select which state set to render. What is the use of state sets if you end up saving multiple scene files again?
2. Disable all question dialogs in batch render mode. (Some plugins ask the user for e.g. a temp path which does not exist on the render farm. And the dialog stays open until someone pressed the button on the farm...)
3. Region settings. Option to enable AND disable the region (in case artists have enabled it for interactive work). As well as the region size/position
4. Render elements base output directory + relative paths.
This is not a batch render only change. Render elements settings should have an option for a base path. And then you can set all render elements path as relative path.
And this base output directory needs to be available via commandline.

General management of the various default settings in the command panel, it can be separated into two parts:

1. The ability to visually determine which settings (Spinners, Input fields, etc) have been changed from their defaults, i.e. they are shown in bold, another color, a small red dot next to them, etc.. This can be helpful to both troubleshooting and general understanding of what each option does, specially for beginners.

2.The ability to quickly and intuitively revert any setting to it's default setting, this can can and should ideally be done at three different levels:

a) At the individual options themselves, for instance the ability to reset a spinner to it's default setting(Not Zero!), say with ctrl+shift+left clicking it(off the top of my head), and so on for any other input field...

b)At the Rollout level, i.e. you'd right-click a rollout's title bar and you'd have an option to revert all options in that rollout back to their default settings,

c)At the command panel itself, where you'd have an option added to the context menu(the one with 'Close All', 'Open All' Options), that would reset all the options contained in all rollouts to their default settings

As a bonus, it would also be great if you could create default settings presets and save/load them right at the command panel, but i realize this might be easier said than done, so just think about it...

The new search tool is great but it can use some improvements:

-An adjustable history option, for instance the last 5 searched terms would always show up at the top of the list.

-search query weighting, i.e. if there are 20 different actions with the word 'Spline' as part of them available in the list, they would get sorted based on the number of times they are executed, e.g. if 'Edit Spline' is my most executed search term it should get placed above other terms (Now this functionality might already be there in which case, nevermind)

-Right now it doesn't seem that the tool fully supports third party actions, please verify.

-It would be nice if sub-object operation were color coded differently than object based operations

A working viewport space viewport mask similar to Zbrush. While working on this big building file with single poly floor slabs and messy geometry and only needing to build out a small corner office, I was wishing that I had some sort of viewport mask to isolate areas quickly rather than slicing the model or detaching faces to work efficiently. For instance, Z brush can mask out areas to make work flow efficient on THAT specific area only. What if Max had a feature where you could draw a dummy box around an area and work in ONLY that area? That would be helpful in my opinion, but maybe I am dreaming.

Thanks.