How would I explain the current patch formula?

Consistency. One that they have also used to refine the game content while still throwing in stuff that are a potential flop risk without risking the entire stability of the game.

What, would you have liked the latest patch to utterly change the game's core systems and invalidate months/years worth of work and content development? Invalidate all current gear progression and force you to start over from earning initial newbie gear so you can eventually regear your character for its actual level? Throw in a system for beyond current max level leveling that breaks the balance of the game so horribly that the only reason you would play is to farm for EXP to invalidate more content? How about the removal of 2/3rd of the content in the game AND reworking the story wasting the millions of dollars and the months/years of work put into it?

In case you do not know, I am describing what recently happened to another themepark MMO called Firefall. Though it was turned into a Themepark MMO away from what it originally was because the investors wanted a WoW clone and had to dispose the guy who started the entire thing before they could truly get to work on what they wanted to do.