A guildmate and I got together to do a Visions run and it turns out, if you are rank 3 and he is rank 5 he doesn’t get a drop for his upgrade.
The problem is I was rank 3 and had lead because I invited him. He (Dartbag - Dalaran) needed drop for rank 6 upgrade, but only dropped for me because I had lead and lower rank.
You might be unaware of the problem since there appears to be no code preventing persons from entering who need different drop, 3 upgrading to 4 and a 5 upgrading to 6.
Did you do one of the bonus objectives or just go for thrall?
In order to get to rank 6 from rank 5 you need to do at least one of the bonus areas. Mainly the ones that drain 8 sanity per second.
We “played it safe” and only went after Thrall. Unfortunately, information was lacking in requirements to get upgrade to 6 and up.
WowHead guide to the cloak:
WowHead guide to Horrific Visions of Stormwind:
It’s not stated explicitly, but the quest you get to go from 5 to 6 does state the following:
By now you’ve noticed the protection of your cloak wavering the deeper you delve into these visions. To further bolster your resistance to N’Zoth’s influence, we will need to gain an even deeper understanding of his nefarious power. Seek out knowledge from manifestations deeper within the visions, and we shall have our answers soon enough.
(Emphasis mine)
You’re not exactly going any deeper if you stick to just the starting area.
Though, admittedly, the next such junction is a little bit more specific in its quest text. It again talks about going deeper, but does specifically mention the “Lost Areas” where the 5-6 junction doesn’t mention the “Corrupted Areas” at all (the area with Thrall is the “Tainted Area”).
There is no additional knowledge to be gained within the visions.
All it needed was to state the requirement for upgrade changes at 5 to 6 and 11-12, which it failed to do.
Maybe it is located somewhere, but you would have go searching for it and you won’t search for it unless you knew what and where to search for.