Yes, the sum of the areas of the event horizons is larger than the area of the original one. This is consistent with the generalized second law of thermodynamics. 

Now, entropy production can also lead to particle creation. About the existence of black holes as small particles there's a serious constraint given by the evaporation rate of a BH: The smallest the BH, the fast it evaporates... 

Is not it incompatible to apply Hawking radiation of particle-antiparticle production in scale of mini holes particle production? I think there is some doubling and some missing.. Higly possibly the GR-QM combination take effects to take care of bridling the evaporation function.

I agree that instead of having a black body spectrum, it will be corrected by a gray body factor. But this is more due to: (1) the presence of coupling among different field components. (2) the addition of 'gravitational damping' in the equations of motion for the field.

Our model shows that it can, but this also requires white hole mechanics and a periodic directional teleportation, rather than a balanced 2 directional teleportation along a spinor. The main difference between one large black hole and a string of smaller ones that total in terms of surface area is in the attenuation of the fields , a term often referred to as a metric of thickness. Many ( black holes/white hole lens) are going to present additional brane thickness, stacked. The entropy would obviously be quite different for a stacking manifold scenario.