Your questions serve against your point. Your point is, well it doesn't matter if their defense was crap... he had one of the top offenses...
Yes a top offense that never won a championship. If he cared as much about defense as you let on, why didn't his team rank in top 10? Top 5? 11 of the last 15 championship teams were in the TOP 5. The best MDA could manage was 13th best in the league... Not too shabby, but it is nowhere good enough to give a team a significant chance at the chip.
We need a coach that can propel us to the top 10, and preferably top 7. We stand little chance of winning without it. It is going to take TEAM DEFENSE to do this. One on one defenders are not enough. The whole team needs to know rotations, and how to defend against specific plays.
MDA has never shown that he is capable of this. His substitutions are poor and he'd rather just out score you.
Like I said before. Melo's defense has gotten worse since coming to the Knicks.