Query about Limited service: Arth-Goldau - Bellinzona January 2025

limited service query

I want to travel from Milan to Luzern in 22 January 2025. There is an information note about this trip:
"Limited train service between Arth-Goldau and Bellinzona are subject to restrictions due to works in the Gotthard Base Tunnel. The restriction lasts from 12.01.2025, 22h00 until 25.01.2025, 06h00.
A modified timetable is planned with trains diverted via the scenic route.
We recommend you to check your timetable online shortly before travelling.
The online timetable is updated.
All Information, connections and adherence to the timetable are given without guarantee. Please check for possible changes shortly before departure."

Does this mean the timetables on the SBB website been updated? I am confused by these statements.

It sounds nice to go on the scenic route.
Will the scenic route take much longer?
As there is the limited service is there anything I should consider before booking this trip?

I appreciate any advice

RedBaron

limited service query
Regardless whether the timetables are already updated or not (looks like they already are):

Whether any train crossing the Gotthard is taking the new base tunnel or the old “scenic” tunnel (regardless of temporary closures as in January) can be easily determined by checking the travel time for the service in question between the Arth-Goldau and Bellinzona stops:
Less than 1h => New Gotthard Base Tunnel between Erstfeld and Biasca
Roughly 2h => Old Gotthard Tunnel from 1882 between Göschenen and Airolo

limited service query

RedBaron, thanks for your assistance