I know others have mentioned this including one post way back in 2015, so i thought i should suggest it again. One of the nice things about Styles is that when the style is redefined, everything with that style should automatically be updated. But that is not happening and if there are a large number of objects with that style, going back and changing each one is a real inconvenience even with multi-select.
Please fix this issue so when a style is redefined all objects with that style will take on the new attributes automatically. Thank you!