Since his moves are powerful, the opponent should stay in stun longer than for weaker moves, making combos easier. But it's still Ike, pretty sluggish, so I wouldn't count on it too much.
Also, watching this vid, at 11:49, we can see Ike's dash>shield, and it's good. Very short dash duration before the shield comes out.
Edit: still watching, at around 23:00, we see a greninja shielding the third hit of Ike's jab several times. Perhaps due to staleness, or hurtboxes properties. Bad news anyway.
At 25:30... it's hurts to watch. Getting jabbed out of his own jab.
28:06 Fair on shield actually looks very safe when spaced, à la Brawl. (also, earlier in the vid, a charged Usmash had a lot of shield push, but that's to be expected)
28:53 bair on shield looked remarkably safe. Shield push was good, and the opponent couldn't grab. Maybe the opponent's grab had tether properties, being too slow to grab Ike before he got pushed too far away. Or maybe his range sucked. It doesn't look like a dash grab or dash attack could've punished it either, the Ftilt from Ike came out surprisingly quick.
Also, from different points of the video: Fsmash was nerfed in killing power.