For 1) moving from three divisions to two places the perfect amount of emphasis on divisional games -- important because you get a real benefit from winning the division but the wild card existing means that you actually directly compete against all teams in your conference, not just your division, for a playoff spot. It also fixed 3) in a pretty elegant and straightforward way.
On 2) I think that there have been some really nice rivalries that have been born out of this new format. Boston vs. Florida and LAK vs. Edmonton are two right of the top of my head. It's also been able to consistently deliver us more traditional ones like Pittsburgh vs. Washington, Boston vs. Toronto, Montreal vs. Boston, the three California teams against one another, etc.
I don't understand how 4) is relevant to the playoff format at all and seems like more of a question to take up with ESPN and TNT