I like the scene that Lauren and Carla starting to know about they are being pregnant, how they process and finally confess to mc. Shame that we only have two scene, I would love to see other characters like judie having scene like this.
Moreover, it will definitely dramatic when other characters get jealously since they discover other character's relationship with mc and all stand in front of mc to ask him to choose which one he love most (Don't know how to describe in English, in japanese ACG it is call 修羅場)
If my guess is correct then stabby mike may play an important role to the harem ending like being the pilot of the plane since we need to talk to that pilot to bring all the girls with us and mike always become different profession in the game.
Also, as oialt may crossover with eternum, I think it is a great idea that using stabby mike and mc's aunt to link two story as the aunt is from oialt but never appear and mike is everyone's favorite.