*the system says supportmode*
The old poster is still in the pack and can -like the look of the station- easily be changed by yourself. in the Steam/steamapps/workshop/content/.. someid.. 2232551595/textures/models/ef_hbf_leipzig/ folder
e.g change "ef_asset_exp_out_bak.dds" << thats what was formerly displayed
simply to
"ef_asset_exp_out.dds" <<- thats what the station displays!
or edit the image(s) to whats your preference is.
Your changes will stay there until the next update or you put the the whole mod in your local mod directory or staging folder to keep it as edited. private. peace.

(*spoiler) besides the four main entrances there are also four hidden entrances: two at the end of the building at the platforms 1 and 24 for street connection at track level. (see the preview pictures carefully)
and two snap connection points inside the building at the end of the tracks of track 2 and 23... these could be used either for subway entrances! or with the "spitzkehre+++ güterbahnhof mit straßenanschluss" the tracks 1,2,23 and 24 could also be used as cargo station tracks.
AND all tracks inside are of course also usable with small depots.
try out!

(*spoiler) In one of the next updates the biggest new feature will be... of course: the two track passing througn Leipzig City Tunnel Hauptbahnhof Station activated in 2013 directly underneath!
It will be a third option for the Track Layout. This will be as accurate as possible under the former platform of the no more existing tracks 4 and 5 and under the building
I also try to paint it with most accurate and recognizable textures and upstairs connections for our sims. The first bruteforce attempts were very promising. Stay on track!
[#Problem still not fully solved yet: without the missing tracks... where or what the could be this tracks 3,4 and 5 (?) to be able to keep the other existing track numbers in TPF accurate.]
[#secondthing without lanes displayes it might not be easy to find the underground station and its snappoints for tracks/tunnels to snap on]
@anmichselbst: Heute mal nicht nur eine Denksportaufgabe für den Rest des Tages.