The way I envision it happening if this were to be implemented:
Initial poke; as players draw closer together (Pike dominant phase). Then when everyone clashes, secondary weapons (not pikes) become most effective, as opposing lines fold and inter-melee begins and people drop their pikes. Yes they still will be effective even during the mixed melee due to their amazing length and support capability, but if someone was to be surrounded, hypothetically they should either drop it for 2nd'ry or try to jump-spin-stab as they run.