i agree. the whole point of mission control is supposed to give you a quick overview. reducing visual information to labels (with often unrevealing terms like 'desktop 1' and 'desktop 2') gives does not contribute to a fast overview, and adds an extra step to finding things.
likely spearheaded by the same clueless person who came up with 'piles' of windows grouped by application. visually it doesn't do very much to help find things (hint: a pile of windows was the problem expose/mission control was supposed to solve). and now that they're going back to old behaviour in el capitan, they're bragging about it like its a new feature.