Board Thread:Theories/@comment-27821571-20160815111819

In that flashback of Ymir as a mindless titan, she looks like a typical tititan. In Utgard castle, ages after she ate Marcel (a titan shifter), she still looks like a typical titan... but why? After a titan eats a titan shifter, their titan form starts to look more human-like, but why wasn't that the case for Ymir's titan? Was it because she was a titan for so long, eating a titan shifter wouldn't do much to the form? 