BD and Kraken dying for free every Sunday should be enough indication as to why this shouldn't be done. The idea behind these bosses is to beat other players for them. If they were meant to be participation bosses then they would be like RD and Kadum. We're actually having a discussion about taking half of the NA prime time boss spawns and moving them to be inaccessible to your average NA player. The timers should maintain some sort of balance as to which either faction has a chance to kill or prevent a kill every spawn. Sunday is already a perfect example of the opposite of that.