Well, I was using their own words. They called it an exploit because it was an unintended effect not listed in the skill’s description. Its existence didn’t bother me a lot as if I had played any Horde matches during its existence, I would just have asked for it to not be used if a Baird was present.
I also didn’t exclude that they may have used it to generate more money through either selling Baird or Boost for the character XP grind.
That reminds me that apparently at some point Lizzie’s Sisters to the End skill worked in Horde even when the entire team was alive, contrary to the skill description(unless it has been changed for Horde specifically). Is that still a thing or has it been stealth fixed? Haven’t made use of it myself(I find having the Silverback in use every wave would kind of take away from the uniqueness of it so I use another skill in its place), so I wouldn’t know nor really get affected by it.