When a default value is assigned a field it would be great if the Constraint Name was somehow made required. If Constraint Name is mistakenly left empty, then generated SQL script fails.
If Constraint Name is made required, it could also have a suggested name like:
DF_[TableName]_[FieldName]
I ran it now (v 3.13.0.0), and it said everything was ok with or without a Constraint Name.
But it's not a huge problem at all, just thought it would be nice to have it mandatory...until you mentioned that different db's have different rules of course :)