@takemehomegrandma
Catastrophic? It seems that most people had no issues with update 3, and of those who did, most were down to messiness with 3rd party libraries etc. Given the small numbers of developers and testers involved, there's always a risk an update like that won't work with someone's setup, simply because there are so many different setups out there. We have issues in my job where we roll out an update to supposedly identical machines and it just fails on some. Not ideal, but that's how it goes.
I agree about the ISO though - a full, clean ISO would be nice as an option for those who want to or need to do a clean install. Personally, I'd like both to be available - an upgrade so I don't have to do any messing with ISOs and reconfiguring my machine after installation, and a full ISO, just in case I ever have a need for it...