Don't forget that if you travel after 0930 it may still be cheaper to use a paper ticket. The CDR (no railcard discounts) is £4.10, but an Oyster off peak fare to London is £2.00, and if you come back between 4pm and 7pm you will be chinged £2.60 on the way back, which is 50p more than a paper ticket! It's even worse for Railcard holders.
I wonder if they plan to ramp up the paper fares like they did with LU? I suspect so! They may also (or instead) introduce evening peak restrictions on CDRs. Fare rises by the back door? I wouldn't put it past them!