Can we just have the Wrath of the Lich King Raiding Scheme?

[raelgun]

There is no reason to keep old hard content in this game intact. People don't go back and relish in the difficulty. Raiders more on to the new raid and non-raiders go obtain all the catch up gear. Keeping coil difficult past it's prime would serve no purpose in this game.

People can see SCoB when the nerfs come out.

I dont just refer to older content, Im also referring to future content, whats stopping SE from designing 3rd coil normal mode to be easier then 2nd coil ?
What happens currently can affect what occurs later, this is exactly what I want to avoid, dragonsoul was made damn easy as a result of the difficulty setting of the prior tiers, my raid group was annoyed by this on first week as we actually cleared all the bosses in the first week.
Due to those of lesser skill, their progression in the past tiers affected our raiding experience, if they had something just for themselves, that wouldnt of happened.
youre also forgetting about potential nerfs to current content, thats always in the minds of the devs in times like these.