Problem with all those “high interest” things is that each one of them bloats engine a bit more, and most of them are quite specialized or situational tools.
We all have C++, so develop your own solution and share source code. People really should learn what is easy and what not, making your first game with
insanely hard and complex features will probably kill project before it even started. Sadly to learn what is hard one needs to burn self few times.
For eg. that deformable terrain, or point gravity, C# scripting, or many “very needed” features, really are not needed that much. I rather have more polish
for features that everybody uses.