This is not an issue. Most people who are intelligent enough to recognize that astrology is not any way to run a government, also recognize that Reagan himself was an actor, and his administration was responsible for the legacy he left this country. We should give credit where credit is due. Reagan's job was to read the cue-cards and get public support for his administration's policies.
The fact that Reagan himself didn't mastermind the policies, doesn't detract at all from what was achieved.