If you have the rock already blocked off and are in the future going to change the boss, why not leave the rock there until then? You've said that this boss is very difficult to kill for people without this rock and without the boss being nerfed. Would leaving it at the current predicament not lower the overall moral of the higher level players who are investing in the longevity of this server? I know you are trying very hard to weed out glitches and exploits, and that is always a good thing this one just seems to not have a happy conclusion for you or the player base.
Just putting out my thoughts, no offense intended at all. ^^
Thank you for your continued work in fixing the glitches that I am sure are indelible and frequent. <3