Naturally, mods conflict with one another, especially when they attempt to alter or rely on the same element. It wouldn't have any negative side effects had conflicts been addressed - yet it is common knowledge that if a mod changes something that another relies upon, the probability is that you'd have a conflict. The mod does still function decently, despite not being updated since late 2015.
Apparently, MC Command Centre has the ability to lengthen the day if IceM's script mod wasn't up to par. IceM's mod also required Get to Work and Outdoor retreat, which I believe (but not certain) is not required for MCCC.