Garthanos
Arcadian Knight
No.
While things like changing the description of someone casting magic missile is neat and all (and that was a rather neat refluff of the spell earlier in the thread!), IMO it leads to the setting losing internal consistency and cohesion.
There are things that exist in the world; magic missile is one of them. When someone uses it, the characters should be able to recognize it, if arcana is one of the things they know about, because that's how things work.
For me characters know "more" about their world than what you see in the PHB. And for those with Arcana, they would also recognize distance cut and Bigbies lesser etherial punch and various other skinnings, and yes recognize them as fairly basic application of arcane forces which exploit various methods of avoiding intervening armor.
Only chaotic to the "player" who thinks he knows as much as the character.