So I found a post here: https://www.reddit.com/r/gpumining/comments/7ixtrv/awesome_miner_profit_switching_seems_arbitrary/ that seems to validate Goose-Tech's reasoning with slightly higher values for both Switching interval (60) and threshold (20%) recommended. The comment is also made: "I don't care about penny gains. You also have to watch difficulty changes. If everyone jumps to a new coin. The coin you are mining might get easier." Will try using these new values and report my findings.