Regarding shorthaul flying A330 you just have to read their EBA (LH) and it was a agreement between the FAAA domestic and international Division that any New aircraft that Qf buy and operate international sectors will be done by the Long haul division. We have a cross divisional structure. 737 shorthaul 747 Longhaul 767 when operated on domestic sectors done by shorthaul 767 international done by Longhaul. there is a agreement that 1% can be done by each other for operation reasons. A330 will be no different. Long haul have lost 747-200 and 747Sp aircraft from the fleet.
747-400/300 767-300 A330 Longhaul (International)
767-300 737-400/800 A330 Shorthaul (Domestic)
At current there is no limit to the number of aircraft a crew member can be endored on!
Unless the company intends to challenge this not sure where they will go!
Hope this help!
(shorthaul Crew Member)