i think the l;ightweight versions are pandering to the market who just don't understand the concept or principle of paramo. i belive paramo is baggy cut as it won't work as well if slimmer cut. i also believe the fashionable light fabric is just that, fashionable.
the reason why? well, i've worn thin pertex, something a bit thicker and the paramo fuera in the rain. only the fuera resists rain for the longest time and seems to let less water through once it gets wet too. using a lighter weight face fabric means that it will wet out quicker, let water through in a shorter time and allow more water through.
for a jacket this is less of a problem as in a jacket there is little constant, variable compression of the fabric as theer is in trousers i.e. your knee moves up and down all the time hence compressing the fabric at the knee and front of the thigh. as this presses the face fabric the face fabric wets out first at this point - or with a light fabric it will wet out more quickly. once this wets out then the liner face gets constantly rubbed with water causeing that to wet out. this can set up conditions by which water may be forced through the liner - your leg is getting quite wet and sweaty as breathability will be zero at this point.
but that's only my opinion. my further opinion is perhaps you need to get out a bit more if you're going to fret about a few grammes weight of stuff you're wearing whose effectiveness could be sacrificed upon the misguided belief in the altar of leightweight.
and the cascada has far superior venting options with full length side zips.