Hello,
There is an opportunity in Dotty to improve operator precedence, associativity, properties, etc. The best place to borrow ideas on this I believe Fortress language (also may be inspiration for better Array syntax and atomic operations).
Also see this recent talk highlighting some of these features and also some Scala comparisons by Guy Steele.
https://www.youtube.com/watch?v=EZD3Scuv02g
S