Not a big change, but I wonder how these changes will effect teams who have rights to players that are overseas or no longer in the league. In the past the obvious choice for over-the-cap has been to just keep them in case they come in handy later (since there was no downside to having extra holds, and teams have used those rights in trades when they don't want to give up any actual asset)
Those holds could now push you over the $17.5m threshold, though, so we could see teams purging those rights in the next few years, which is a little sad.