Idea to stop all the fighting

[Kika Maslyaka]

Firs of all, difficulty of a target is not related to the instancing in any way. You can have a guild drama over a target which is completely trivial to kill, and on other hand, you have an instanced encounter of INSANE difficulty, which only 1% of the guilds will be able to kill, regardless of how many free attempts they get at the target in question.
In other words, one has nothing to do with the other

Second, here is my thoughts on Instancing:

Pros:
-removes raid drama
-removes play time constraints
-removes need to race to the mob, since its always be available
-guarantees target availability on EVERY spawn spawn cycle
-allows guild to gear up MUCH faster

Cons:
-ruins the MMO world immersion
-removes guild competition
-removes the need of guild cooperation and values of sharing (in other words promotes anti-social behavior)
-caters to LARGER guilds, in case of truly difficult encounters (if target would be non instanced, then number of smaller guilds could combine powers to kill it, but guild instancing removes this option)
-greatly increase loot flow into the economy (even if loot is no drop, instancing means that many players get fully raid geared MUCH faster, since each guild automatically gets their own 100% guaranteed raid share), and contributes to player completing content faster, and running out of things to do