Well archinstall makes it as easy as debian
Discussion
Upgrades are non-trivial as they'd have to be familiar with command-line and most would be perplexed by the many options.. I believe Gardua (built on arch) has a graphical upgrade manager though. op mentions Manjaro which is an arch distro. I use arch, it is meant for those who are willing to upgrade regularly and can handle when it fails.
Personally for n00bs I would go for Mint OS, Zorin or Elementary OS which all have graphical update/upgrade options and are very familiar to those who come from Wind0ze.
Well it depends, there are people that start with arch, but a minority, not the rule. I suggest Debian for my friends starting with Linux, I don't see why mint and etc could be better as those distros keep newbies away from the terminal. I know some that used mint Ubuntu and etc and are very afraid if using terminal, of doing SSH into a node...I think the earlier one breaks that mith that terminal is hard or for hackers the merrier.