Hmmm....i HATE hand luggage and strive to take on as little as possible - namely because i'm quite chilled and don't mind waiting that extra five minutes for your bags and know how to lock them like Fort Knox so NO baggage handler is getting in my bag - they couldn't even get in to it in JNB. I was so proud.
If you're travelling in Business of First i think you should be able to take on what you could before the 10th Aug as it can get stored elsewhere rather than over head bins.
But economy? I say keep the new hand luggage regs!! The size the BAA imposing is just right and will stop pax on certain flights thinking their handluggage is an extension of their checked in bags.
I work at check in and have seen it all - from car tyres and cat litter to 30 fake Ben Sherman shirts in cabin baggage. Is that REALLY necessary!!!