The Season 4 order indicates that Syfy has at least enough faith in the series to want to invest in another batch of episodes.
Maybe releasing episodes en masse will be the kind of event 12 Monkeys needs to pull in an audience moving toward the very end.
The ratings certainly haven’t been stellar over the years, and Syfy wanting to be rid of 12 Monkeys ASAP would certainly explain the entire season over three days.