Wiktionary entries have audio samples, to show how a word is pronounced. These used to be accessed by clicking a small play button, at which point simple audio player controls would be displayed and the audio would be played. The new audio player always displays the full player, including the completely useless (on Wiktionary) "Timed text" button. The player taking up additional space is problematic, as are the numerous bugs in the audio player.
(I should probably open separate bugs for most of these, but just to quickly list: It crams a giant useless "audio" image into the settings box which opens after the file finishes, wastes virtually all of the space in it anyway, settings box has the wrong z-index, audio breaks entirely in some cases (see 2nd audio in [[wikt:food]]), wastes space in the player itself, has a completely messed up line-height in the settings box, and by the way, it appears to be advertising a commercial website in it, with a direct link to "Kaltura"'s sales page prominently displayed... ) Back to the point:
While the new player might be an improvement for Wikipedia, it seems fairly clear that on Wiktionary it's a step backwards. I suggest that it be either either modified to work well with WT or disabled entirely there.