Antminers tend to fail when you configure too many pools in the .conf, and you get dead time mining on those pools that don't pass the initial connection test (eg. getting a packet lost to cloudflare ddos protection) -- which, in order to even consider doing, you have to do manually by SSHing into the machine (an S7 in my case).  My S7 has room for 3 pools in the Bitmain interface, and no way to choose the rotate option, except for manually SSHing into the machine and adding it to the .conf file myself.  If I use too many pools (eg. 5 or 6 or more, manually configuring), the S7 tends to invariably not connect to one or more of them, and gives that dead mining beeping for the entire duration of the rotate.

So I disagree strongly.  I find this switcher quite useful for the fact that I do NOT have to keep SSHing into the machine whenever I want to briefly mine some other coin.  Would it be better if Bitmain allowed us to enter more than 3 pools and had a rotate option in their config panel?  Of course.  But in the meanwhile....

I do, however, question why the author went with hours instead of minutes in the duration field.  Minutes would be far more useful and far less restrictive.  And tying it in to some difficulty/exchangeprice listing to give preference to whatever coin makes the most sense out of a list would be even more useful.  If it allowed for minutes instead of hours, I may have considered sending in a donation.  But forcing hours seems a bit unnecessarily restrictive.  In any case, my $0.02 for what it's worth...