EWL,
I am just putting forward a perspective for you. It is hardly patronising, particularly when compared with the tone of your initial post. It is plain to see that you do not like the product. However, as a travel professional, most of your role is doing as your corporates ask, and my experience is that most corporates now want best fare, same as they want best deal on a vehicle purchase, accommodation, office equipment yada yada yada.
None of the negatives you raise in your subsequent posts are hidden by Jetstar. They may annoy you, they may annoy some of the punters, but they are not hidden. They don't even hide the fact that the itineraries will take 24 hours. Punters will weigh the pros and cons .... transfer my own bags, but know there is a fighting chance they'll end up at the same destination as me, and save a couple of hundred for the effort, I think I'll do it. Pay premium rates for connectivity, miss my connection due to late aircraft and then find my bags are still a couple of stops behind me? Sure the travel arranger may feel warm and fuzzy that they got their itinerary in 30 seconds and a similar but different commission, but is the punter happy? When booking any airline on line, the answers are instantaneous, so there is no waiting for answers, only intineraries - but you do have confirmation number & flight details on the spot.
I go back to my original statement, I dare you to find any booking engine that will cope with the demand that a ripper Jetstar sale does (and yes, I battled the slowness to get my 2 for 1 deal). Yes it's annoying when it goes slow, but the sun still rises. I say again, I am not patronising you, but I do wait for some balance in your posts. Let's hear some of the stories of connectivity gone wrong, bags never to be seen again, poor business class pickings on a premium carrier. Plenty of those stories out there, but either your punters aren't telling you, or you're not tellin' us!
Cheers
Prado