Yep, it’s a major design issue.
One example, there is a barrier near customs exit to “protect you” from one of the carousels (?#4) which is about 1.5m in width to the tape barricade protecting the customs entry point. Meaning pax from the middle who’ve collected their bags cant easily get TO the customs queue without either going through this choke point (and clash with pax going other way for whatever reason), cant get past slow moving pax in same direction, or going around behind oversized baggage (and past the hoarde of 500 pax waiting for baggage from carousel 2…..). It also means there’s a significant part of the carousel that cant be used to access luggage collection. As i say, just one example in that space.
Basically the whole areas needs double the floor space in the baggage collection area and better “marshalling” towards customs queue(s). And smarter carousel allocation. In this instance, i think less carousels and more open floor space would actually be better.
Once you hit the customs person, if you have nothing to declare (and they agree you appear low risk eg. profiling, travel location etc) then it moves ok. In this instance, i think it was slow as the Bali flight pax were being additionally screened (due to livestock disease in Bali to avoid importing to Australia) whereas the DXB flight appeared more straightforward (presumably most connecting ex-EU, ME, Africa) and the queue picked up speed once less Bali pax and more ex-DXB pax.
Also of note, NIL covid instructions / assessment / discussion. Just a sign saying if you feel unwell to advise them.