Found your thread (which got no traction/responses three weeks ago) on a search (after seeing Chevrot's 'fastest Frenchman' claim) with intent to review if any changes had been proposed. Regret cannot offer any info.
Here's Thorsten Radde's analysis, from his informed perspective:
https://www.trirating.com/...mburg-2023-accident/
"[he] was working for German television who were showing the race via a live stream on their main sports website and also providing updates and summaries for linear television (such as news and their regular sports program “Sportschau”). [His] role [was] “Commentary Assistant” which means that [he] was giving data updates to the commentary team and helping the producers with information about race development. It means that [he had] a similar view to the producers with screens for all cameras and recordings (which may include replays of race scenes to preview before deciding if they go on air)."
And here's Lange's take: https://www.instagram.com/...MzRlODBiNWFlZA%3D%3D
with recommendations/suggestions:

1. Minimize the number of media motorcycles during races.
2. Restrict managers or private photographers from using motorcycles.
3. Enforce a strict rule that support vehicles maintain a distance of at least 50 meters from athletes.
4. Allow camera operators or race officials to ride alongside athletes only on wider roads and for limited periods.
5. Prohibit motorcycles from riding alongside athletes on roads with two-way traffic.

It’s unlikely they are able to change the bike course much. The first iteration (2017) had a much more interesting route but apparently they couldn‘t get it approved again by authorities (too much issues with blocked traffic and complaining residents). It‘s always an issue in larger cities, also for other races.
FYI this is (almost) the one from 2017: https://www.strava.com/routes/7407624