If Link misses a Dair and hits the ground, free fsmash, so Link's aren't gonna be using it too much unless he knows It'll hit. Some Link's like to dair on their way down to counter attack someone juggling them
Any good Link knows how to either:
-time the dair so that it auto cancels in time
-use it only at appropriate times, which like you said, means they know it'll hit
And usually, Link players nair on their way, it's a lot safer than using dair.
Not standing by itself, unless you're talking about pivot boosting -> ftilt.
Link's attacks aren't amazing, their speed and power are both little below average. But that low power gives him combos, but his speed makes them harder to do.
Against Ike, I can see where you're coming from when you say little power. I mean, against a light character, there's tons of power. And like Ike, Link can only be slow if you want him to be. ^_^
Link
is the fastest faller in the game. This speeds up his shorthop aerial game by a signficant margin. Plus, Link has a good pivot boost that can match his dash speed. Now, some of his attacks have huge KO ability. The big ones are the dair, fsmash, utilt, spin attack, dsmash, ftilt, and fair.
Since Ike is heavy, he can probably survive against the utilt and dsmash. The spin attack, believe it or not, has huge horizontal knockback at high percents. The fair...that's kinda hard to land against an Ike who knows how to space his nairs. Fsmash is kind of predictable, but ftilt can KO at the same percents as the fsmash. Also, it's usually the least used tilt by Link users. So it probably hasn't been decayed that much. A pivot boost -> ftilt is something to watch out for.
Seriously, if you can avoid Link's kill moves, you'll easily survive to 200% (That is if you don't get Gimped...Which Link can do good at)
Link's not the best at gimping, but he's an effective edgehog. While hanging on the ledge, he can use what's called the zair edgeguard. The zair is the clawshot in the air, and it tethers to the stage. As you know, when someone grabs the stage, invincibility frames appear. So by tilting back and grappling again, Link can reattain his invincibility frames. He can do this up to 3 times. The video that Swordplay posted shows how deadly that can be for Ike.
As for the kill moves, you are correct in lasting up to 200% if you avoid them. But look what I wrote above. Link has plenty of kill moves most people don't think of.
Ike will have to aether onto the stage to avoid being gimped by Link then. If Link is waiting on the ledge, I believe the boomerang can't be angled to hit Ike (Can a Link testify whether or not he can, from hanging on the ledge, throw a boomerang so it is angled to hit upward diagonal) if Link can't do that then a QD Would work to counter a Link just hanging on the ledge. (But if Link could do that, wouldn't Ike be screwed anyways if he wasn't QDing anyways...)
Again, going back to the zair edgeguard, just because Link is hanging does not mean Ike can't be gimped by using aether.
But I'll say this, Both Ike and Link have to work hard to win, those combos and projectile walls aren't easy to keep doing consistently with Link's speed
Well, like I said, he's the fastest faller, and Link players don't usually stand in one place for long. They move a lot (if you play one that doesn't, chances are he's not a good Link). Aiming the projects is easy, and again, like Ike, Link is only be slow if you want him to be.
Link mains get my kudos for using a character thats even more underrated than Ike.
Kudos to you Ike mainers as well, I know he's not an easy character to play and win with.
Now......it seems a lot of you are forgetting about Link's AT's. He has the most in the game, expect them to be used.
-DAC
-bombsliding forward (pretty much a glide toss with a different control input)
-reversed bombsliding (same thing but Link retreats with it)
-bombsliding with upthrows (glide toss, sorta, while Link throws the bomb up)
-zair with bomb in hand (aerial clawshot with a bomb in hand)
-arrow canceling (gets rid of the startup lag of shooting an arrow, can be done from a bair, with a bomb in hand, after a boomerang is thrown, etc.)
-bombsmashing (using an fsmash with a bomb in hand)
-Gale guarding (throwing the boomerang at the stage while the opponent is recovering in order to push them away from the stage)
-zair edgeguard....i've explained this already
-craq walk/pivot boost (Link has a quick pivot boost that can match his dash)
-ZAC (z drop, a attack, catch - Link has a bomb, than when he's in the air, performs an aerial with it in hand by dropping it and quickly doing an aerial, and catching it in the midst of the aerial)
-jab canceling (Ike mainers know all about this, I'm sure)
-jab lock (Link has a jab lock in which he'll jab the opponent when they're down, walk a bit, and repeat)
Other things include bomb dropping by simply letting go of the bomb in a jump (which most players don't see coming), bomb shielding (similar to Snake's technique, you shield til the bomb explodes), bomb placing, in which Link can place bombs on ledges and platforms, attacking out of shield, usually the upsmash (a damage racker)....and that's all I can think of. Hope this helps.