From Little Barrera's army...
This is a great article and I completely agree about the need for more games to see how things shake down.
Re: Tomb Kings, I think they'll shoot through the roof once we have a clear idea of the magic. As I consider testing them, it appears that I'd have to roll 2d6 to find the highest dice for my opponent's dispel pool but that the spells still work unless dispelled, as per the army book. That's very, very useful, but there's still numerous questions to answer. It may not be worth trying until the PDF clears it up.
As you pointed out!
I suspect the game will revolve around the horde rules, though I suspect it's the 20mm armies that will use them most while the 25mm focus on linebreakers and multi-charges.
With the Winds of Magic staying consistent regardless of the points value of the game, it's a mistake not to grab every caster you can get your hands on for smaller games, meaning armies that don't rely on uber generals and BSB's have a distinct advantage there. It should shake out as the 'standard' becomes adopted, whatever that will be.
I've heard tell peeps think 2500pts...
Another thought I've had since chatting with the Master Manipulator (every store needs one) is regarding all the new magic options the big book has released for every army. That's going to open up a variety of new options for every army.