TRIGGERS:
1- I suggest a better way to manage multiple triggers, could be a "Global Trigger Manager", select more than one and move as a drag and drop on the list.
2- Options to:
"Select and Add triggers to Input X (one or more inputs can receive and merge triggers from another input)"
"Replace triggers on input X (One or more inputs can have the triggers replaced)
3- A trigger to disable triggers. An option to disable triggers to run more than one time in a single input (could be a script too)

INPUT TAB COLOR ON AUDIO MIXER INPUT:
A feature to color the audio tab on audio mixer based on the main input tab color could make much easier to find a audio input source

LONGER TIME ON CUSTOM TIME TRANSITIONS:
A possibility to use longer times as a transition, we use a lot 4K camera cropping on 1080 productions and this feature will help as to "zoom" or "pan" the input much " much more smoothly"

MORE NDI OUTPUTS

MORE VIDEO OUTPUTS (EXTERNAL TOO)

MORE OVERLAY CHANNELS

PREVIEW INPUT AS A PREVIEW ON MIX 1
Possibility to add a copy of Preview Window as a Vmix Input (To send a custom multiview via any output to the production director instead capture the preview input window, for example)

CHANGE AUDIO OUTPUTS WITHOUT RESTARTING VMIX

MORE AUDIO BUSES

MULTIVIEW:
*Option to aling to other layers or guidelines
*More layer on multiview

ENABLE AUTO SAVE PROJECT OPTION

DISABLE/ENABLE "LAST" PROJECT OPTION BESIDE THE SAVE BUTTON

GT Title Designer:
*Better way to edit colors and other things as effects, transitions on multiple elements selection
*Keyboard shortcuts
*On "Configure automatic Text Box resizing" option is on "WidthAndHeight" it is much interesting to respect middle and center text aligning and the resizing could have the central point as a reference and not the up left corner as a axis to resize the box.
*One transition similar to Continuous to have for a stoped item, for example, a lower third has transition in, one waiting transition and a transition out.
Could be a timeline (as After effects) too. :-D
*Expand transition could be really diagonal instead size and up together.

To be continued...