I’ve a feeling there were proposals to close the Fish Quay to traffic so this would solve the problem for the 333. Of course there are plans to move the ferry landing to the Fish Quay so problem then would be how to serve that with a connecting bus.
The 335 seems a good idea, the traffic lights at ASDA are dreadful so it would eliminate standing there twice on the current double run. It seems to provide more shopping links which would help increase loadings. Hopefully different operators for both!