OP is talking about the EO ACC so fuel savings and noise abatement are irrelevant. Our EO ACC is 1500 minimum with 800 only applying to the all engines operating case.
Personally I think it best to enter the Flysmart EO ACC in the perf page. That way you have a readily accessible reminder of the minimum value. If you suffer an engine failure, there’s nothing stopping you from delaying the acceleration until you’re comfortable. There’s nothing saying you MUST level off at the EO acceleration altitude, you have to secure the engine and complete any turns anyway, but there’s also no good reason to actually change it to a higher value preemptively. Unlike the all engines operating case, the EO ACC altitude has no effect on anything in the cockpit , it doesn’t automatically increase the speed for example.