I suppose if you have an external blog, you can simply summarize the potential criticisms on your LW post and link to a further discussion of them elsewhere. Or you can structure your post such that it discusses them at the very end:
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Optional reading:
In this way you get your point across first, while those interested can continue on to the detailed analysis.
Discuss things here if they don't deserve a post in Main or Discussion.
If a topic is worthy and receives much discussion, make a new thread for it.