I know that people will bring up Gidle or Winner as example however these groups simply had their biggest hits after they lost a member. That's simply a correlation not causation.
The groups that lose a member have a damaged, washed feeling to them. They just don't feel fresh anymore. It is like a rising sports player getting a long term injury, they just never feel the same after that.
Companies like SM and JYP after their experience with 2PM and EXO realise that. That's why they are hesitant to let any established member go anymore, no matter what the scandal is.
Additionally 3 members of LSFM are known from Produce and Izone and the member who was kicked out is one of the 3 fresh members. So it is even worse for LSFM than other groups.
I think SouMu should consider adding a new member who will add that freshness back, if they have any great plans for this group. They are barely 3 months old. RV did it, so it is not something unheard of.