Okay, friends. Here comes the devil's advocate, and he says:

As one who has agonized over the blurred lines between ELU and ELL, I now find myself thinking that maybe, after all, we don't need dividing lines between ELU and ELL. Maybe there's no value in spending so much time and energy building and defending fences. Maybe there is no harm in throwing open the gates and saying, "Come one, come all! Welcome to the new Using the English Language StackExchange site."

Give me a second to duck and cover while you ready your slings and arrows.......

ADDENDUM 9/17/13:

I admit to being mildly surprised that my above "devil's advocate" post left room for interpretation, but I also admit I was not explicit. Allow me, then, to be explicit.

1. I consider it evident that all (certainly most) of us who are so enthusiastically engaged in this debate are enthusiastic users of both sites.
2. Ergo, all (grant me "all," if you will) of us enjoy answering and/or debating questions and subject matter on both sites.
3. Because we love English, top to bottom.
4. We are entirely capable of self-selecting the posts/questions that interest us. Each of us can respond to the ones of his or her choice, and ignore the others. We do this anyway. We simply do it with the added burdens of jumping between sites and carping about whether any given question should or shouldn't be on the site we're visiting. Why bother?
5. Therefore, what actual harm does it/can it do to allow any and all posts pertaining to the English language to wash up on the shores of the proposed *Using the English Language* StackExchange Site? (Proposed name subject to debate, further suggestions, voting, and so on.)
6. Yes, I do mean and propose one conjoined, ecumenical site for all.

I'll be hiding out in that cave over there if you want me.