Not really, given that passengers will access the south Merseyrail platform at Headbolt Lane by walking across a bit of platform between the two lines.The whole point of the new purpose built terminus at Headbolt Lane is the removal of the concrete block from the middle of the trackbed, since the recent crash revealed how dangerous it is for passengers to be stood in the path of an oncoming train that fails to stop at the buffers. It certainly will not be permissible in future to walk under the bridge.
Plus the crash happened just before the Headbolt Lane detailed plans were published, so it won’t have factored into any of the decisions leading up to it.
The real point of Headbolt lanes design is operational (to assist with turnaround by having 2 single lines) and future proofing for through running to Skem or Wigan from one of those lines.