This topic is 2 different ideas in 1 big proposal with extensive syntax changes.
It does not answer or cover issues and questions raised in previous discussions about these matters.
a) Function application does not seem to offer anything new. It currently looks like calling the function by writing things in different order.
b) Range Literals: PEP 204 - Range Literals: Getting closure.
Given the size of suggested changes in comparison to accompanying research and analysis, I am moving this to “Help”. It could be useful to discuss these and brainstorm further for those who are interested to join in at this stage.
If OP is willing to make a longer commitment to working on these, I would suggest tackling each a) and b) separately.