The roadshows are more of a screening and info session, the interviews are normally only done in Abu Dhabi.
Depending on how many attend, there's usually more than one informational session. Some history of Abu Dhabi, UAE, Etihad, etc. A review of the package, pay, benefits, housing, entitlements etc. Growth plans for the fleet and the airline in general. You'll most likely be given the opportunity to ask some direct questions.
Afterwards we went to a separate room where we were asked to fill out a basic info sheet detailing flight time, experience, type ratings, etc. They took the names of quite a few and gave a choice of interview dates to others. Logbooks not required.
Yes over recent years a Boeing or Airbus type has been required, however they have hired non typed in certain cases.
I don't know if they will relax this requirement, however current fleet expansion will bring on 20 narrow bodies over the next 3-4 years, and almost as many widebodies. This is pre 787 and 350 deliveries, and includes only 2 of 10 380s.
I think doubling the current amount of pilots is a conservative estimate.