I do think they should either reduce the number of S ranks required, or lower the threshold to include A ranks.
15 S ranks is certainly doable, but given that people have jobs and other responsibilities in their life, not to mention the erratic scheduling, and... yeah I can already dread the market for this particular emote. If they added triggers for MB3... hyper dread
I'm personally more annoyed they sent out a tweet for this at 8pm PST. By then we actually had 2 Mining Base 3 UQs happen (one of them was an unscheduled that happened at around 1pm PST iirc). I didn't even know the event was active until the people on the Tweaker Discord mentioned it, so I made sure my alliance knew about it before the scheduled MB3 >_>
I don't think MB4 is going to be an issue at all either, outside of maybe the very first run. I saw videos of people taking out Apprentice in 2min. And this was when they didn't have Nemesis or Slave.