On a basic level I understand the intention, because repeated fixtures can make the league phase feel a bit samey, but the execution is so clumsy that it ends up inviting more criticism than praise. The reverse fixture being allowed is the bit that really gives the game away, because it makes the rule feel less like a principle and more like someone trying to tidy up a spreadsheet after the fact. And honestly that is the problem with UEFA all over, they keep layering on these little fixes like they are solving something huge when all they are doing is making the whole thing more annoying for fans who just want the draw to be the draw and the football to sort itself out, proper unnecessary meddling and it does my head in