I tried withdrawal on bitrex today but couldn't get through. The complain was a limit of transaction for the day, is that what they mean with new updates
No that may be an issue on your end. The update of trex was that there is a new limit for orders, which seems to be inconvenient if you got some spare satoshi's you want to spend.
Orders having a frame of 28 days is something I can live with, but the min. order size should remain intact if you ask me.
It's not common practice to force users to certain actions, if those actions/rules don't benefit them.