That's correct. You can't just change terms without noticing users AND agreeing to them.
That's completely against the law and illegal. A statement that if
someone does not want to go through the new terms and verification process,
give the option to close accounts and return funds to user.
I agree, a 0 BTC daily limit unless verified is NOT the product I signed up for before I gave Bittrex my money.
Many people don't want to get verified because they don't trust exchanges with personal data, simple as that.