A lot of people are having the same realisation as you are about the fare difference. In some way, some might argue that the difference is negligible, so just cough up and take it, and why not, because you get a swathe more benefits compared to the Getaway fare.
In another way, others may argue, why should we pay more for something which used to be included in the lowest fare that they were used to, especially when rack (and sale) fares are both increasing.
If VA successfully convinces many people to take the higher fare than they are used to purchasing, even if the difference is "slight", that will be more revenue and a victory for them (and the new fare model).
For those who are stuck with BFOD purchasing policies, this could be difficult all around, so no Fly Ahead for them. On the other hand, it doesn't mean that you couldn't front up and try to get an earlier flight; it just means it can't be done "officially".