There appears to be undue bias in the choice of performance; "…
possibly be more prudent to get airborne following an engine failure". This thinking should not influence performance calculations.
for info;
"
Minimum V1 - the minimum permissible V1 speed for the referenced conditions (temperature, wind, pressure altitude, weight, thrust, runway etc) from which the takeoff can be safely completed after the critical engine has failed at the designated speed (VEF)"
"Note that Engine Failure Speed (VEF) is a manufacturer nominated design speed that must be greater than Minimum Control Speed - Ground (Vmcg) and occur at least one second prior to V1."
https://skybrary.aero/articles/v1
See CS 25 for the full certification requirement.
and don't even think of shaving margins near Vmcg. Performance requirement / testing in this area is a very grey art; no crosswind, dry runway, good surface, specific forward stick position, …
The 146/RJ is a delightful aircraft to fly with great capability, but Vmcg is one corner of envelope with fuzzy margins because of the attributes - 4 engines, big fin / rudder, high lift wing, …