Feature Suggestions

Try this.
https://digitalfossils.com/Download/NVil-Apr-19-26D-Steam.zip

Fixed. Thank you!
One more thing. Noticed this. Is there an option to hide this tooltip, it happens everytime a loopcut is used and seems quite useful first time, but distracts later. At least because there is too many text and it is orange

Try this.
https://digitalfossils.com/Download/NVil-Apr-19-26F-Steam.zip
View > Display > Heads Up Display > Show StreamLine Tool Hotkey Prompt


--24. Add a checkbox in Preferences to use LoopCut in every subobject mode, or to automatically switch to edge mode when using LoopCut (or make it work in every subobject mode). Now I handled it with a little bit awkward Composite Tool, but looks like it would be great to have an option to this in preferences for everyone
Q: Can you send me an image of the composite tool contents? info@digitalfossils.com.

--7. Make P_Chamfer Edge to work with objects enabled symmetry
Q: How do you tell it does not work with objects enabled symmetry? It works in my test.

Try this.
https://digitalfossils.com/Download/NVil-Apr-19-26H-Steam.zip

--24. Add a checkbox in Preferences to use LoopCut in every subobject mode, or to automatically switch to edge mode when using LoopCut (or make it work in every subobject mode). Now I handled it with a little bit awkward Composite Tool, but looks like it would be great to have an option to this in preferences for everyone
A: When subobject stramline tool hotkey pressed in object mode, selection mode will be switched to subobject mode automatically.

--7. Make P_Chamfer Edge to work with objects enabled symmetry
A: See if it is fixed.

Seems working fine, thank you

24. Maybe it should be a checkbox on preferences. I assume some people may have their object mode tools assigned on the same buttons of streamline tools for subobject mode. So they won`t get access to their object mode tools as it automatically switches to subobject mode

There is no need for a check box. Because in the situation you described, the tool for working in object mode will be activated instead of switching to subobject mode. You can make a tool to test it if you want to.

Great!