No, the roster is not commutable unless you are RH. He gets to go spend every weekend back home in London. The rest of you will be stuck in Abu Dhabi.
Ask these questions at the road show..
Is there a pension plan?
How many flight requests/days off can you request a month?
How many annual leave tickets do you get?
Can you take all your leave at one?
What is accommodation like?
What are the standard of hotels you stay at? (Particularly Geneva, Paris)
How many roster changes a month can you expect?
Is the roster published in a fair and transparent manner?
How is overtime calculated?
When was the last bonus paid? (NOT PROFIT SHARE, BONUS)
If you choose your own housing is the allowance paid all at once?
Anyone else have anymore?
After you get all those answered, go apply at Emirates.