Kelda is in the rotation at Gencon, yes.
Kelda is quite different from other glyphs in the way it shifts things positionally. Other gylphs are fought over, but with Kelda you fight over access to it. There are times when it's extremely hard to stop your opponent from using Kelda, but most of the time there are either ways to limit your opponent's access, burn it yourself, or at least force your opponent to burn it for relatively few wounds.
Of course, there are also times that other glyphs we use, like
Valda or
Ulanvia, can be determinative in a match. There's no guaranteed balanced glyph.