I agree with most of your points but to be honest I read the P0x article and agree with most of its points as well.

Overall I much prefer hive but

1. I think the tokens in the P0x reward pool are actually pretty awesome (BAT DAI and LRC).
2. I don’t think P0x not having their own token is a problem in and of itself
3. However the way P0x’s rewards work does not seem sustainable at all!
4. P0x is not trying to be a community. I have read somewhere (maybe in their FAQs) that they want to be just a blogging platform (like Medium) and that is what they are (just not a very good one - yet!!!).
5. When the author said that on P0x everybody is equal, they are referring to the fact that you don’t need to invest a lot of time or money before you’re earning enough to even buy a coffee or beer with P0x as is the case with hive (at least this a common feeling amongst hive newbies). Or in other words, as someone else already commented, it’s a good entry point for non-crypto people. Having said all that, your argument against this is that it’s centralised which I also agree with!!
6. The author of the P0x is an experienced hive (steem) contributor so they know what they are talking about (note - I’m not suggesting that you don’t know what you’re talking about!).

Just my two cents.