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Re Label SJ, the label wasnt made by Suju, its a gift from SM for their 10th year anniv and a result of god knows how long of a negotation between suju and the label. Do note that when renewal contracts are signed between a company and the group the negotation is individual.
I also assume and because he hinted it in the past, that Leeteuk played a huge role for the formation of the label. It is a wise, time and cost efficient way of sm in managing suju, since among all the sm artist, suju are the only ones who are active not just as idols and
Not just a group but individually, they have more individual schedules than as a group as they age in almost every aspect of the entertainment industry, it is hard to manage them within SM. They also have their own business outside of SM.
Leeteuk always pushed for the welfare of suju and thinks long term especially after their military hiatus thats why label sj was created. He convinced the members to still remain in sj while still doing their own solo activities and projects. And the members trusted him a lot.
So maybe do hope that your group still wants to remain as part of the group and promoting together and have a leader as good as leeteuk in talking and communicating all his plans to the group and company. And have the members trust him in all of this 
And btw contract renewal negotations usually happens 2 years before it expires. Its individually and sometimes the idols would bring along their parents.
And btw label sj is still under SM Ent.. The major decisions are still decided by SM. They are still interdependent with each other (as most labels are). The label oversees suju and has a separate staff that only works for them and obviously suju has also a say re decisions.
Its just that compared to other idols in different companies who just follows whatever they told (well except for those who owns their companies like shinhwa ang highlight) suju has more power and voice to the things they want to do and over the label.
