Set Region in Locale from contentDimensions settings

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If I have a language and a region dimension, this is ignored in the Locale at the moment.

See Packages/Application/Neos.Neos/Classes/View/FusionView.php

public function render()
{
    $currentNode = $this->getCurrentNode();
    $currentSiteNode = $currentNode->getContext()->getCurrentSiteNode();
    $fusionRuntime = $this->getFusionRuntime($currentSiteNode);

    $dimensions = $currentNode->getContext()->getDimensions();
    if (array_key_exists('language', $dimensions) && $dimensions['language'] !== []) {
        $currentLocale = new Locale($dimensions['language'][0]);
        $this->i18nService->getConfiguration()->setCurrentLocale($currentLocale);
        $this->i18nService->getConfiguration()->setFallbackRule(['strict' => false, 'order' => array_reverse($dimensions['language'])]);
    }

    $fusionRuntime->pushContextArray([
        'node' => $currentNode,
        'documentNode' => $this->getClosestDocumentNode($currentNode) ?: $currentNode,
        'site' => $currentSiteNode,
        'editPreviewMode' => isset($this->variables['editPreviewMode']) ? $this->variables['editPreviewMode'] : null
    ]);
    try {
        $output = $fusionRuntime->render($this->fusionPath);
        $output = $this->mergeHttpResponseFromOutput($output, $fusionRuntime);
    } catch (RuntimeException $exception) {
        throw $exception->getPrevious();
    }
    $fusionRuntime->popContext();

    return $output;
}

and Packages/Application/Neos.Seo/Resources/Private/Fusion/Metadata/LangAttribute.fusion

prototype(Neos.Seo:LangAttribute) < prototype(Neos.Fusion:Value) {
    value = ${String.replace(documentNode.context.dimensions.language[0], '_', '-')}
    @if.languageDimensionExists = ${Configuration.setting('Neos.ContentRepository.contentDimensions.language') != null}
    @if.onlyRenderWhenInLiveWorkspace = ${node.context.workspace.name == 'live'}
}

Is there a reason to not make this configurable?