A 5700HQ is perfectly fine. That's a 14nm non-Atom part. Compared to a bleeding edge 9980HK, each core is only 25% slower. And you don't need more than four cores here.
More relevantly, a 5700HQ is five to six times as fast as this Atom.
Oh, sure. My point's just that a 3-4 year old design isn't a big deal, and if you're concerned about performance it's absolutely not the age to worry about.
More relevantly, a 5700HQ is five to six times as fast as this Atom.