I feel bad for you as I always seem to step on your feet lately. I have a "superteam" which is something I always was pretty much against, but too often have I been in your shoes with a roster strong enough to reach the playoffs but not enough to win anything.
I changed my way of managing and yeah, it really works, but it only relies on brute force.
That being said, I can't sustain this forever, even with the wins, I'll make one or 2 seasons and then I'll have to think of something else because my bank account is getting slowly drained.
Nowadays anyway, I don't think you can still win with a good roster, as one team around will be paying premium to have a fantastic one (I'm spending 1,16 M on wages) and beat you.
@Giodeb : Nice work on surviving your first BBBL season like a boss ! You have a good team, not very old, you can be proud of you.