I think besides 2 double deckers on service 854 (BSEP), which
helps to enhance the high capacity; additionally there should be 2
more high capacity buses as well, to preserve the link from Yio Chu
Kang Road to Yishun.
Ofcourse it just cant be 2 BSEP DDs... 854 gradually needs to
get many more DDs and then it will be okay.. There isn't need for a
3rd service if capacity on 854/857 is increased, which in last few
months has anyway been on the rise.
Now 857 is operating with >50% DD fleet after AMDEP DD
deployment (though dont know if perm yet)... + 854 getting more
upgrades... I wonder what the situation was few months back when
857 was SD full fleet and 854 was continuously downgrading bendies
to rigids and adding more rigids instead.
So I think situation is def getting better.