Arena size - my biggest mistake, I stayed too small for way too long. I invested in players trying to get promoted quickly. That worked till I got to Div II. Now I'm stuck here, if I am lucky, until further notice and my team has gotten old, way older, in the meantime trying to pick up players who would help me stay competitive. Catch 22!!!
As for the dynamics, every season there are a new set of teams joining, this year the Div I relegated team is rather weak having two monsters & a bunch of who dem players. This should be an opportunity for others who want top prize. Unless, someone goes on a buying fit. Last season the Div I relegated team was strong & won the division.