If you never plan on changing your show layout then leave it alone. But most people will change their show from year to year, add a model, delete a model, move a model from one port/controller to another, change controllers, etc. and if you anticipate doing any of those then you are going to spend WAY more time and frustration in the future than the few minutes it would take to convert your show to the "new and improved" method. Seriously, it doesn't take that long to convert it and from that point forward changes/modifications are easy peasy. It is your show, so do what is best for you and you are the only one that knows how you are going to manage your show in the future.