I thought the whole point of the "enrollment phase" was to give players the option to participate and to have matchmaking based on that cohort.
I do agree that CG needs some better AI programmers because a 3man, well-modded team with G12 solo, cls, or thrawn could wipe out teams 30k+ higher in power. The matchmaking doesn't seem to account for this (nor did GW back when that was poorly matched). This also echoes the earlier reply about how GP is a terrible metric for matchmaking.
Our guild had a rough time fighting a full g12 team of zCLS, zThrawn, GK, zBarris, zSolo -- strong teams are clearly better on defense because they're virtually guaranteed to neutralize more than 1 attacking team. In this case that group probably took out 5-8 teams.