There are a number of points I’d like to bring up about the fit of pants. 1)There are pants styles today which are extremely tight. One might even say non-tznius for its accentuation of the body. 2) The classic loose fit of dress pants today, is a relatively new style, than only came about in the 80’s and 90’s with the “sack suit” before this, most dress pants were much slimmer and actually followed the leg line. They were NOT skin tight or drastically accentuated certain areas of the body. But one could be assured that someone had a leg underneath and not two little kids holding you up. 3) The loose flowy pants most yeshivish guys wear today, do not look put together. They looked about as presentably dressed as a cheap waiter.
There is a wonderful medium, and it is definitely closer to today’s more fashionable styles.