The name change means nothin, 2 chainz was and is his ad-lib, he been rappin like that for years.
When Codeine Cowboy, ridin round and gettin it, call teisha all dat shit came out, he was still called Tity Boi, and that was the same random, wild style on TRU Realigion.
I'm pretty sure he changed his name because the ad-lib was so popular down here and most people knew his ad-lib better than they knew his name.
Same way he changed Playaz circle to Duffle Bag Boyz cuz everybody was callin them niggas the Duffle Bag Boyz.
Yall actin like he usin the name change as a gimmick, nigga dis aint rasslin.