PvP needs its own stat to differentiate PvP progress from PvE progress. If there was no Morale, there would be no need for PvP gear, and then the person with the advantage becomes the person who's cleared Coil and got the drops.
Now, you might say that they could just set an iLv cap at 50, after all everyone can reach that fairly easily, and then everyone in PvP is equal. The problem with that though, is that then there is no progression in PvP. Without progression, it's just a dead piece of content people say they'd do "for fun", but in reality they try to queue up and it takes so long that they don't, because nobody is doing PvP regularly for progression. For PvP to properly function, it needs a solid community participating in it for more than just fun, if it doesn't, even the people who would just go there "for fun" cannot.
Again, the main problem with Wolves' Den is how they worked progression. They made it far too steep, such that the majority out right ignored it. With no reasonable progression, the majority didn't stick around, and Wolves' Den was left with a community that could barely sustain itself, let alone anyone who wanted to jump in just for fun.
So, again, can we please stop with the strawman that people only want Morale to be "teh leetz!"? That is not the case. Any rational person wants Morale so that Wolves' Den and Frontlines can be functional pieces of content with a community that sticks around to aim for something, so that "casuals" can just drop by for fun when they want, and hopefully stick around to aim for the same gear and become part of the community. It's not even about wanting world renowned quality PvP in XIV, it's simply about wanting a PvP community in a MMO we enjoy.
Congratulations on being ignorant to the fact that they balance PvP and PvE separately. Did the Miasma II nerf affect your PvE experience? Didn't think so.