re a) True, but it is in place and that is now the status quo. It's getting the fans through the door, not me perhaps, or not often anyway but many. And the Blast could go 'free to air', just not on traditional BBC.
re: b) is it worth a go? There are examples of sports Government bodies seeing prestige tournaments whither because they didn't look after them. In cricket the one day competition. In football, the FA Cup and The League Cup are nearly invisible while all the action has moved to the European League/Cup thingie and the competition in the Premier League is in reality limited to the same old same old 'glamour' clubs. All because the Governing bodies chase money at the expense of the sport. If The Hundred fails the ECB itself may well need a bail out even while Graves and Harrison have moved onto better things.
c) Well yea, I do resist naturally change especially when it's something I like that's changing. On the other hand, my initial argument was that broadcast TV itself has changed. People naturally think back to Richie Benaud on the BBC and also how the 2005 Ashes were such a big thing, partly because of the BBC. As it happens 2005 was the year when YouTube was launched. Netflix launched in 2012. The Hundred may fail because the model is harking back to a past that cannot be recreated. And the ECB have gone all in on it.
I am in two minds about whether I want it to fail or not. If it succeeds will it damage County Cricket, don't know but it's possible. If it fails will it damage County Cricket, don't know but it's possible. Either way the ECB have made a big bet.