Just to follow up and share what actually worked for me.. I used a long & friendly title for the page, then I overrode the text for the breadcrumbs.

add_filter('the_title', 'enfold_child_the_title');
function enfold_child_the_title($data){
    global $post;
	if(is_in_function('avia_breadcrumbs')){
		// NOTE: check if $data has already been changed to the menu text
		if (!($data === $post->post_title)) return $data;
		switch ($post->post_name) {
			case 'myslug': return 'My Short Title';
			// etc..
		}
	}
	return $data;
}

function is_in_function($functionName)
{
	foreach (debug_backtrace() as $k => $v) { 
		if ($k < 2) continue; // ignore self & caller
		if ($v['function'] === $functionName) return true;
	}
	return false;
}