This statement could be enlarged to the whole Airbus design.
Sure enough it is not the principal factor leading to the MEL incident. However the MFF concept with models with such a variety in performance, number of engines, fuel tanks, system and checklist variations simply increases the risk of a stuff up. The statements of the pilots concerning the acceleration feel is quite symptomatic.
Which is also true of the "MFF" on various Boeings. Presently flying 6 variants of 777 with different weights/speed limits/engines and vastly different takeoff and landing speeds to boot.
Then there's the 757/767 rating and 737 variants.
Before I get flamed, I'll acknowledge the general systems commonality, but I don't believe that's an issue in this or similar incidents.
Captain flew 98.9 hrs in last 30 days.....wow
When you're tired, the obvious suddenly isn't so obvious after all.