I'd like to say this now, and it's that Link can still lock opponents in Jab. His jab attack is quite fast, and he's still capable of locking opponents with the first jab if you are fast and precise enough. I've managed to do it at around the same speed of the original Jab Cancel, just by pressing the A button at exact intervals and speeds. Link can lock opponents in his jab, yes, but remember to use USpec if you plan to hit them out of it. It may not be the Jab Cancel, but it's still a somewhat effective means of attack (though not as good as the Jab Cancel, but it works). Plus we cannot forget that Link's second jab is also great for combo setups and even sets a lock on opponents.
And yet while Link lost the ability to Smash attack with Bomb (which was a bug), and his whole Bomb Toss Cancel (another bug), he's gained significant buffs to him as well. A dash attack that comes out sooner, U-Throw > U-Tilt combos, D-Throw having better strings and Spin Attack dealing massive damage.
Lastly, let's be thankful that Link's Bombs still destroy projectiles, like Samus' cheap Charge Shot.
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Luco
I do have to say that it is hard to grab Jigglypuff when the opponent is in air most of the time. Jiggs is a very annoying opponent to Ness and will exploit any screw up. Just don't land an F-Smash and whiff it; a good Jiggs would counter with Rest or Sing...then rest.