One of the criticisms levelled at ADwD (though more so at AFfC) is that they "spend a lot of time going nowhere" (particularly in terms of the plot). If this were indeed valid criticism**, I don't see how this fits in with your idea that this suits the TV adaptation more than, say, the print original.
At least with a book (
any book in a series, that is, by any author), it won't become fully clear that the readers have been turned off the series until they don't buy the next one***. TV companies get a very quick indication of viewers deserting a show, and (as in the case of
Game of Thrones), critics giving their views on every episode, every week. This is why there have been discussions about what would disappear from the adaptation of AFfC (presumably prompted by those who do think AFfC was a bit slow)?
Bearing this in mind, wouldn't a version of ADwD written to suit the TV have been (considerably) shorter, and have contained far more of the overall plot? And wouldn't it have a far smaller number of locations?
** - I don't think it is, but then I like a plot that sits properly in its world and which shows the consequences of all the major action (whether well meant or not) on that world. Dany, for instance, is having to learn by her own mistakes, and given the number of people whose lives are (partly) in her hands, the consequences can be disastrous. The alternative is a Dany who would be unbelievable, one whose actions are guided by some sort of magical goodness, so that she has a knowledge of human nature and of how to pull the levers of power that would surpass that of any ruler in the real world, however experienced or gifted
****.
*** - Has the criticism of AFfC harmed sales of ADwD?
**** - Even Napoleon Bonaparte.