Recirculation jet
I agree.
The recirculation jet is very useful for saturating the laundry quicker, for mixing the detergent more thoroughly, and reducing the amount of 'stop-start' fills that some other machines seem to do.
I don't know why Electrolux/Zanussi/AEG removed the recirculation jet from most of their machines.
I think that it is a sensible feature - especially with the 'ever decreasing' water consumption of modern machines. I have encountered standard machines 'filled to the gunwales', where the load never gets properly drenched. Conversely, a similar load in a machine with the recirculation jet, does get properly soaked.