This looks really decent mate. About the bottom six, I see no point in moving McLeod up to the 3rd line. He held his own and found some success on the 4th, its such a speedy line that breakaways are an inevitability. But like Wood I think he is a poor contributor on a line prioritizing possession of the puck over a simpler game like forcing turnovers, rushing the neutral zone and dump & chase. What I'm saying is that McLeod is such a limited player I have a hard time seeing him succeed in a different context, so don't break him and Wood up. I don't think McLeod is gonna develop much further as an NHLer anyhow.

Following this line of reasoning, you'd have to scratch Jankowski which seems fine to me. If he makes the team he'd be an adequate 13th forward, may beat out McLeod for 4C.
Using your players, this means that the 3C spot would go to either Boqvist or Kuokkanen with Boqvist having the first go at it, he looked really good at 3C at the the end of last season.
I don't think AJ was bad at all last season relative to the team, just stupendously snakebit. If none of the forward prospects make the team right away from training camp, I'd want him to play 3RW with Boqvist at center and Kuokkanen on the left, or at the very least play him at 4RW over studenic.

Forwards

My guess is this is how it starts....

1st: Zacha -- Hischier -- Bratt
2nd: Tatar -- Hughes -- Sharangovich
3rd: Kuokkanen -- Boqvist -- Clarke
4th: Wood -- McLeod -- Johnsson

bench: Greer, Jankowski, Studenic (on starting roster because he needs to clear waivers before he goes back to AHL)

By end of year....

1st: Zacha -- Hischier -- Bratt
2nd: Tatar -- Hughes -- Sharangovich
3rd: Foote -- Mercer -- Holtz
4th: Wood -- McLeod -- Kuokkanen

bench: Johnsson, Clarke, Jankowski

Call-ups....in order they arrive:
Clarke (starts year on roster at 3C or 3RW)
Foote (early, maybe start of year for 3LW and PP)
Mercer/Holtz (mid-year)
Thompson, Zetterlund (back and forth as needed)

Defense

To start year...

Graves -- Hamilton
Smith -- Severson
Siegenthaler/Bahl -- Subban

bench: Jaros, Siegenthaler or Bahl

By end of season....if Subban is traded.

Graves -- Hamilton
Siegenthaler -- Severson
Bahl -- Smith

bench: Jaros, Walsh or Okhotyuk

Call-ups....in order they arrive:
Bahl (maybe start of year)
Okhotyuk, Walsh (as needed)
Vukojevic (cup of coffee by end of season)