See slide 13: https://www.slideshare.net/Odersky/preparing-for-scala-3#13
With scala 3, syntax has been simplified even more, e.g.:
No more braces necessary. Top level declarations. Extension Methods.
Optional braces seems like a weird feature to me. I would prefer consistently. I think a language should either be "bracey" or not. Just pick one!
Eh, that slide isn't really worth looking into. None of the languages there have a uniform way to represent the grammar. If you look at the C# and Scala grammars you'll find that the Scala one is highly compacted, whereas the C# grammar is intentionally not compact. They're encoded in different formats.