Correct, but his old man knows the score. He's a Hun, of course, but not a Hun Hun. He was delighted when his loon was motm and scored the winning goal at Hampden to take the dons to the cup final ahead of the scum, as was Lewis himself and McInnes despite the fact that they're rabid Huns it seems.
The comparison with Jack is a good one. A very good player, and exceptionally mature, at a young age. Didn't seem to have the belief in his own ability to progress out-with Scotland despite being clearly good enough, wanting to be the big fish in the smaller pond as is his right (and he's still a very good player). I think Ferguson is a little bit more like McKenna in that regard and his old man* will certainly instill that in him too. I think he has the potential to be an absolutely fantastic player, there's so much visible space for improvement there.
*Having heard his uncle speak a few times over the last few years, I've actually been impressed with his attitude and grounding (very self deprecating, which was a surprise) and I get the impression he'd advise his nephew to be the best he can be too, and that doesn't require a move to the Hun at this stage in his career.