CONCLUSION - In conclusion, I won't discourage balanced teams, they have their own set of advantages, and can beat balanced teams if the balanced team are not as 'balanced' in skills as necessary. Once again I can't stress the difference between 'salary-balanced' and 'skill-balanced'.
So, both types have their good and bad points:
1. If you have a completed arena, then by all means go a buy a monster team with good offense and defense on all positions! ;) Of course this is not always possible, hence the research...-
i. Balanced beats unbalanced if the 'balance' is properly distributed. Let's say 60-40 to balance.
ii. Balance costs more financially, but is very long term because young monsters in unbalanced can cost a lot, so managers tend to buy veterans.
iii. Unbalanced has the element of surprise. How many teams want to attack an 80k big man when they see a 20k guard on the team??
So in conclusion both teams have advantages and disadvantages.