We (or rather the client) has paid 7.5k for PE tickets at times so yes 4.5k is pretty good IMHO
I agree that they are lower ex US than ex Aus but unpredictability means that is awkward to arrange
Given they are disbursements the cost is not a huge factor, they are thankful they are PE rather than J
The seat pulling isn't that big a problem if you can figure out which seat to get, travelling by yourself bulkhead window seats are great, very little occurs, it happens to your neighbour, I would avoid the row of 4 in a 747 at all costs unless it was a front row in front of a bulkhead ie the bassinet row without babies - seems all the 747 are slightly different configurations on the A380 the row in front of the exit row is protected by a half height bulkhead, there is no seat pulling there..