That whole premise is derived from the assumption that Solo is easier than All which currently is pure conjecture. It also ignores that All with friends has the potential to far easier than Solo.
Whilst that's been the thrust of my comments, there have been other negatives of this model raised. Mainly by Hogs I believe.
Any discussion at this point will be conjecture for the simple fact that the game is in beta. I don't think that's disputed. Most likely a lot of the discussion therefore is based on:
1. The mechanics as they are today
2. Communication around possible or likely changes from FD
3. How other games work
That doesn't mean to say taking all this into account means any of us will hit even near the target in predicting what might or might not happen. To give specifics on the 3 areas from my perspective:
1. From what I gather
today, solo is 100% the same as open except without human player grouping.
2.
a)FD have stated they won't make the AI as good as a human player. Someone else linked to DB saying this in a video and also I have seen it in a DDA thread by a FD designer.
b)Many intrepret the all open vision as described by FD as not a pvp arena
style experience.
3. I'm sure there is one, but I personally don't know of a game out there where the PVE/NPC aspects are harder than the PVP aspects. If this isn't true in 100% of cases I would suggest it is in the majority.
The main point of this post is to explain why some of us are discussing this. Of course the whole discussion is invalid to a degree due to my first point re: beta, etc... No-one is forced to take part in this discussion, but unless a moderator says otherwise (and locks the thread) everyone is welcome to.
Also, I feel any discussion on "griefing" is even more fruitless. For some, "griefing" encapsulates pretty much any form of PVP, for others, the definition is much narrower and restricted to stalking a specific player for days on end for example (and most of the playerbase fall somewhere inbetween but not at the same point). This is why I always put the term in "quotes", although I should probably avoid using it at all.
The only way to ever address this is for FD to publish their definition and dem be the rules for ED.
EDIT: sorry Seonid, I missed your last point. Indeed, All with friends (based on how other games work), does have a decent chance of being easier than solo.