Please don't bring too many breaking changes. Each project written with an old Nim version will have to be ported over or die. We already don´t have as much libraries as we would like.
If it's required to have a better language (I left where the sole breaking change of 2.0 would have been changing the imports) thatś a good thing, but if it's for things like style insensitivity, removed for a few edge cases, I don't see the value (that and the fact that I use it a lot).