Isn't 83 only looping at Sengkang? Unless they are going to
change it to Sengkang <> Punggol (loop).
Actually, I see no issue with 83 remaining at Punggol.
Punggol Bus Interchange currently has 38 parking bays, and there
are only 14 bus services.
There is still space for more bus services at Punggol - although
probably not enough in future when Punggol is more developed.
IMO, the problem with Punggol Bus Interchange is with the
traffic flow, or poor management of buses, because from the looks
of it, there are more buses than what is needed during peak
periods... the possible reasons could be bus brunching,
etcetera.