While checking if the bug MC-98146 still persists, I found that MC-98146 is fixed - apparently.

I don't know if that was intended and has anything to do with e.g. changes made for MC-86164 but I wanted to state it, so that the fix for MC-98146 could be kept (even if it was not intentional), and any changes to Armor Stands, e.g. due to MC-86164, that still have to be made, would not cause the apparent bugfix for MC-98146 to vanish again, as Marker-true-AS rendering their equipment from ALL angles (like Marker:false AS) is very benefitting for the mapmaker-community.

Before 16w38a, the name of AS with Marker-tag set to true is at the BOTTOM of the AS - now when I entered my bugpost-testworld, I found all my Marker-true-AS got their name changed to at the top, like also Marker-false-AS.
Apparently this is caused by Marker-true-AS also now having a hitbox, unlike before 16w38a, and apparently this hitbox was needed in order to fix other AS bugs.
(Pics attached).

I summoned another Marker-true-AS in 16w38a to confirm that the name will appear also at the top, not feet anymore and checked that it is indeed a Marker-true-AS after summoning via

/entitydata @e[type=armor_stand,r=2] {}

Summon command:

/summon armor_stand ~ ~1 ~ {CustomName:"Marker True",CustomNameVisible:1,Marker:1b,ArmorItems:[{},{},{},{id:skull,Damage:3,Count:1,tag:{display:{Name:"Meri"},SkullOwner:Meri}}]}

If more issues occur due to the AS change, I'll add them of course.
Relates to MC-108008 "Hitbox of Marker:1 Armor Stands lets Passengers appear now ABOVE them"

As for MC-98146: Please do not mark it as "Resolved", until it's sure that the above mentioned change is wanted or why it changed at all.
(Edit: Marked as fixed now, but I really really would love to have a confirmation it was an intentional fix which got simply forgotten to be resolved as fixed by the fixing Dev.)

Suggestion As stated already in MC-108008
A possible solution would be to give us an offset-possibility, e.g. also for/including the displayed custom names on AS.
In MC-108008 the offset-possiblity would apply to the positioning of a passenger-entity as well.