I haven't voted yet.
I am a new owner so I hadn't a chance to see how the updating is working.
In my opinion the system should be easy as it can be. So I prefer the easier one, which one this is I can't say.
And another important thing is. Let's say in 2 years I must do a refreshing of my forum and want to install everything again. For this I must own the files somewhere because maybe in 2 years you will not support anymore your add-on. Maybe you will have a family or you have to work etc., so no time for coding and looking after your add-on.
So it would be great to possess something. Like the zip files everywhere else. I make an archive of my add-ons so I own all the old versions, too. Just for the case I need it.
But going via ftp to the folder and searching the right components is for me too dificult. Because some of the add-ons are spreaded in many folders. So you can not know which one belongs to which one. So I would prefer sth simple like now Xenforo uses. 1-click download a zip-file which contains everything. So as long as I own this zip-file, I will always be able to use it, no matter if it gets supported or not.