Actually, the Kegworth disaster would suggest that changing the flight deck from what the crews are used to might be a bad idea
The Captain had a total of 763 hours on 200, 300, 400 but only 23 of those hours on the 400. Copilot 192 total 300 and 400, 53 of those on 400. Report mentions the reduced conspicuousness of the vibration indicators on the 400 and the fact crews didn't have any simulator time on the 400. Haste in shut down, all not helped by high workload associated with the diversion. Gotchas creep out from everywhere.
Report
https://assets.digital.cabinet-offic...990_G-OBME.pdf
Commentary on panel layout
https://assets.digital.cabinet-offic...BME_Append.pdf