I actually think much of the relevant info from parent articles could be redistributed/reworded to the Paragon Market item articles. To put it another way, once we have the Paragon Market Item articles to hold the details, the parent articles can be stripped to essentials.
But what makes a Character Slot (in this example) bought from the market any different from another character slot? A character slot is a character slot. There's no real difference between the default 12 slots per server, and additional purchased slots. The only "difference" is that some are purchased for Paragon Points, something which can easily be noted in a subsection within the existing Character Slots article. Also, character slots could formerly be purchased from the store, and the Character Slot article operated just fine containing all the store information.
I'm operating under a "If it ain't broke, don't fix it" mentality here. I feel that if there is an existing article that could contain Paragon Market info just as well as a separate article, why create a whole new article? Many of these new articles will be self-referencing anyways, with links, redirects, and "See Also"s.
Let's examine slots closer. How exactly would the information in the current Character Slot article be distributed to "Character Slot x1", "Character Slot x2", and "Character Slot x5" articles? Right now, the current Character Slot article contains everything you would need to know about character slots. Would you really want to create a page, that said nearly the same thing, except for "you can buy one of these in the Paragon Market"? And then a second page, that, again, said the same thing, except "you can buy
five of these in the Market"?
Alternatively, would you really want a little stub of an article, that said "This items provides five [[Character Slot]]s, and costs __"? And two more articles, with little more than a single sentence and a link to the main page? I say it would make much more sense to have the link from the Paragon Market article go straight to the Character Slot page, and contain a section or sub-section about market items and pricing there, rather than duplicating articles or creating articles so small and that link to the main page anyways, making them, in my view, effectively pointless space-wasters.
Again, I have to reiterate, it's a good idea for
some items, but in cases like Character Slots, or Respec Tokens, or Server Transfers, or Archetypes*, items which have existed before and which already have perfectly solid articles, I can't agree with a whole new page for each one.
*I hadn't even thought about archetypes. How exactly will a whole new page for these work? MUCH better to just say, on the main archetype page, something like "This archetype is restricted to ___ Reward level or purchase in the Market for ___ Points." Heck, just add a line to the archetype infobox giving info as to its requirements for playing. No new article needed.