In response to some of the questions asked above:
The first main difference in the game mechanics is indeed the shortening of the Reaction chain, as described in the review. Because of that there is also no need anymore for the deteriorating quality dice and the bookkeeping that came with it.
The second main difference is that the options for troops, weapons and troop traits from FoF and TW/D&T have been combined into TNW. So there is no need to buy two or three books anymore.
This is not a comparative review. I declined going into the differences between FoF/TW/D&T vs TNW because I wrote my review for people interested in the new ruleset without any assumed knowledge of the previous sets. Those have been unavailable in hardcopy for years after all and for someone who doesn't know them a comparative review would be meaningless.
But it might serve its purpose as an addendum to the review as soon as I find some time to write one
The size of the game is downwards flexibleBeing a big skirmish set, like I wrote, the system works equally well with fewer figures and even individuals.
There might be a final book deal in the purchase. As someone on FB pointed out AA apparently have stated on Discord that buying the PDF entitles you to all subsequent versions, including the final fully edited one. With piccies you know...
I omitted this from the review however since I bought mine on Wargamevault and the purchase conditions were not clear about this.