Should via use be used when it is not essential?
Vias have inductance and resistance, if you want to find out how much and if it affects your design, use a calculator tool. In short via inductance is usually measured in nH's and adds a few mΩ's of resistance. 

For large currents (10's of Amps) it is probably a good idea to start paralleling vias. 

For high frequency signals (50Mhz+) the via inductance will need to be factored into the transmission line to reduce reflections.