The phrase "and however effective" is correct and usable in written English.
It can be used to introduce a contrasting idea or to acknowledge the effectiveness of something while suggesting a limitation or a different perspective.
Example: "The new policy is well-received, and however effective it may be, there are still areas that need improvement."
Alternatives: "regardless of its effectiveness" or "despite its effectiveness".
And, however effective it may be in conversation, in written prose the adjective "fucking" never quite replaces other, more exact means of conveying emphasis or emotion.
"Late this year" isn't now, and however effective Google's new set of control features may turn out to be, they're useless for parents who want to change the control parameters for their children's internet use today.
In his New York Times review, Bosley Crowther called it an "obviously low-budget job," referring to the shocks as just "old-fashioned and melodramatics, however effective and sure".
To divide the world into good and evil, however effective that is as a means of building political support and however gratifying that may be to Americans who see their country as a "city on a hill," risks broadening a war that would be better kept narrowly defined.
An ideal cancer treatment modality should suppress and eradicate metastasis; however, effective methods are yet to be developed.
In the Times, Bosley Crowther damned it with faint praise, writing that "Hitchcock, an old hand at frightening people, comes at you with a club in this frankly intended bloodcurdler"; he found it "slowly paced" and referring to its "old-fashioned melodramatics, however effective and sure".
However, effective and efficient strategies to reactivate drug memory remained elusive.
However, effective and precise image retrieval still remains a problem because of the extreme difficulty in image understanding, and high-level knowledge required.
However, effective and safe systemic delivery of siRNA into the brain remains challenging because of biological barriers such as enzymatic degradation, short circulation lifetime, the blood brain barrier (BBB), insufficient tissue penetration, cell endocytosis, and cytosolic transport.
But the legitimizing of tools to block arbitrary web addresses or snoop on and redirect ordinary traffic, however effective or ostensibly well-administrated they are, simply is not something anyone who supports a free and open web can allow.
However, effective and efficient collaboration requires that the methodological principles are common.
