the reason of the new points system is to highlight to you which foods are worst for your weight-loss and which ones are better. potatoes are not that bad: they're 1 propoint per 50g, so 100g is 2 pp and 150g is 3 pp. I normally cook roasted potatoes to my fiancé, cut very thin 200g look quite big and they're filling foods.
pasta is 1 pp per 10g dried. So 40g (medium portion) is 4 pp. 60g (large portion) is 6 pp. 60g of pasta is very filling... have a simple tomato sauce with it, 1 tsp of oil (1pp) and some fruit & veg, and you had a 7pp only dinner! Have 50g of pasta (5pp) with ragu sauce made with passata, basil 1tsp oil and 60g of lean beef mince (3pp), a tsp of parmesan (1pp) and your dinner becomes 10pp, which is reasonable when you have a daily allowance of 29, and is VERY filling... plus, you had all the nutritions that you need, complex and simple carbs, proteins, fat and fibre.