Those power rankings look reasonable to me except I would not have put Miami so high, and I think the Suns will definitely be better than Philadelphia. Unfortunately the Suns will have to do better than this to make the playoffs. The Western Conference might not be quite as top-heavy as it has been the last two years, but it is extremely deep.
Small, finesse, "hustle" teams with no interior defense never do well in subjective "power rankings." Get used to it. If Suns fans want their respect, they'll have to hope it comes in the form of wins.