Wrong. The different name color is part of the UI and no more immersion breaking than having a tab with your spells. There aren't actually floating names over people's heads in Thedas.
False the name color give you the same information as the size but using an outside clue.
The aura is just a gameplay thing, much like the rally aura in DA:O. They're also not actually there, just like rogues aren't actually invisible when using stealth.
Selective immersion breaking i see,having a visible aura on screen is fine because "it's not really there" but having a boss bigger than the standard minion size is wrong. Funny.
You think that having a different colored name like in previous titles is the same as an enemy being twice as large as everyone else? Seriously? A yellow, orange, or red name is nowhere near as obtrusive as a person who is literally several feet taller than anyone else involved in the battle... normally, the name isn't even displayed unless the character is highlighted, so how is that in any way comparable?
Yes it is, it's just another mechanic more oblivious for making player notice boss in the middle of the crowd. Nothing more nothig less.