Not too long. Not too short. Not overly descriptive. Not overly normative. Correct holding. Concise, understandable and clear.
Just like filing a permissive counterclaim doesn't waive an otherwise-preserved objection to personal jurisdiction, ditto for venue (e.g., on the basis of a forum selection clause). A couple of older courts have perhaps held otherwise. But that's neither the majority, nor the correct, rule.
Wonderfully said here, Judge Gould.