I feel that the route of 980 has duplicated 167 too much.
Therefore, I think that it could be amended as such:
This will provide better links between Sembawang, Ang Mo Kio and
Bishan. Besides, it also serves Ang Mo Kio and Bishan MRT
stations.
Route is quite gd as it links AMK to Sembawang.
But I will prefer this scenario, extending 851's route to
Sembawang using current 980's route into Sembawang, shortening
980 to Yishun duplicating current 169 to Yishun. The
reason is there is 166 linking AMK West to Novena and Little
India and there is 162 linking AMK Ave 8 to Novena. In
addition, 980 will become a rather circuitous route in my
opinion.
Just a thought.