At first I thought like there are constrains but except for 16581/82 on Sun Tue Thu(6am to 11:55pm pf 3 sometimes on goods line) no other train occupies pf for long period. Extension is possible. If ers exp extended with current TT it will arrive smet at 8-10am and dep at 1-2pm no issues..
And most probably in new tt all smet trains will have TT changes.
Any constraints of ers band ?