i haven't tried a new WP dishwasher so I can't really comment on their design. My Frigidaire is a new design though, with the BladeSpray wash arm. It alternates wash arms (meaning doesn't operate all of them at the same time). It has some "filters", mostly a glass trap that I clean out monthly…or if I notice the dishes having some grit on them, which isn't often. The cycle times actually aren't bad. I don't pre rinse my dishes at all. I usually run it on Normal with heated wash and heated dry. Cycle times are typically 70-78 minutes. The Heavy wash runs about 2 hours if the load is very dirty. Not bad in my opinion. I can say though that it cleans very very well. I'm very happy with it. So I don't think all new machines are bad.