Quite. Complying with DDRG regulations is very expensive. Any station that is refurbished now must be upgraded to comply with such regs...that's normally why many stations don't get upgraded!
Thats a good point but I was noticing at Stratford overground platforms yesterday that there is still a large gap between the platform and the train there and they have not that long been refurbished. Same at Cannonbury and Highbury.