I read your series today and I really liked them. Your opinions are well supported, and your analysis covers each keyword from many different aspects in a broad view.
I have one correction to make though. Suspend wasn't the first ability to use the exile zone in a way that no other card could, imprint in Mirrodin block did it first (albeit in an unexciting and not very memorable way). This mechanic still has quite a lot of untapped design space.
I don't have an idea what the first keyword would be. Trample is one of the most beloved mechanics of all time, that plays well and has history. However, it's not very innovative - many attacking/blocking mechanic have been made alongside it from the very beginning, and it's not as resonant as flying.
OTOH I definitely know what will make the worst ten keywords of all time: Shroud!
I think opening a thread for each archetype will require too much space. I mean look at aggro decks. There are (including relatively rare archetypes):
White Weenie
Mono-red
R/W
B/W
B/R
R/G
G/W
Zoo
5 color aggro
U/W fish
And they behave differently than their slower counterparants (R/G aggro is very different from R/G ramp, B/W aggro is different from B/W control etc.).
Maybe merge some of them together in one thread, based on something.
The reasons to play the archetype:
Many player's default plan is to draft blue, and for a good reason. After you've done that though, you usually need to complement it's weaknesses with another color. If you see a great number of black removals and finishers you might want to opt for this archetype. Some multicolored cards are tempting as well, with finkel, Agony Warp etc. fitting very easily into blue control's core plan.
Also, what do you think about Armillary Sphere? I want to get 5-color decks stronger and as I've seen from conflux drafts and casual decks this cards enables them really easily.
Generally Skullclamp is better than Jitte, it should be in the list. Moxen, Black Lotus and Timetwister aren't automatic first picks.
P1P1 I'd consider narrower cards as well, like Balance.
Not to say that Armageddon or Survival of the Fittest aren't first picks, I'd certainly take them over a mox P1P1, but they are a step below.
If you're already playing blue, why not to play a ninja or an ophidian?
It doesn't say much if I say it's worse than Wilt-Leaf Liege, does it?
As I said, I wouldn't cut any.
If I had to cut a card, Eladamri's Call performed a bit worse then the others, if that's worth something.
You win games in cube by playing LoA. It probably shouldn't be in your cube, but you all still haven't witnessed it's full power. I'm sure it'll find the way out eventually.
In regular drafts as well, if you see a bomb that doesn't fit your strategy but has the power to win the game itself, you'll pick it (like white aggro decks picking ***, or slow decks splashing Blaze for well-known examples). A card being a natural fir to a strategy raises it's value but only by that much. In cube it's the same, just the card has a much higher threshold. Aggro decks should happily be able to draft LoA and be able to overwhelm opponents with both board presence and card advantage. None of the cards you mentioned fit into any deck, most of them are narrow (and some of them are not first picks IMO). LoA will fit into any deck and that's especially important P1P1.
If someone would be the first to take the risk and try it he would succeed.
@ The point of the thread: If I could play un-cards I'll play the enjoyable cards even if they cannot be printed as real cards. I don't have an example for this.
Well, if they have the choice of killing it or losing to it, it's awesome. You don't suffer card disadvantage most of the time when they destroy it, it starts netting cards from the first turn of the game, costs nothing, cannot be countered, it even produces mana. You can keep on the draw a hand with seven lands and still win. What can be possibly better in your cube?
I'd certainly do it. Not a close pick at all. Also P2P1 and P3P1, and that's without looking at my deck, with above 90% certainty. Sol Ring is also better.
Agreed. When people don't include power in their cubes they forget Jitte, SoFaI, Balance, Skullclamp and more are way better than, say, a Black Lotus or a mox.
Urza's Rage (I added Resounding Thunder instead of it. Has a possible cost to pay and does avoid counterspells)
Fireball (rarely ever used the divide ability)
Disintegrate
Ghitu Fire
Demonfire
Earthquake (I prefer Rolling Earthquake)
Banefire