Yes that can be done too.
But I actually am fine with Owner mode now that I went through an off-season with it. I like I can hire and fire staff, upgrade my stadium, or move my team if I want.
I needed a change. I played so many games in my year one 32 team franchise (played a lot of games other than my Dolphins games).
I just want to focus on my one team now going forward. I am playing NHL and 2K16 too so I am crunched for time now.
But absolutely right. Turn off coach firings and problem solved.