Certainly bad for families. No more favors and discretionary power delegated to the wardens! Additional guests will have to pay.
Not bad for me personally since I almost always travel alone (

). Still, an obvious "enhancement".
Now, if the difference in pricing between SEN and Business lounges were higher, many SENs with large parties would have an incentive to move to the Business side instead of inundating the SEN sides.
Of course, nobody in their right mind would ever spend 40 EUR per guest for a 1-1.5 hr of SEN lounge access.