I am extremely amused by the generally negative outlook on this update most people are having as I'd say this looks like an extremely awesome update which removes the need to grind ages endlessly so long as you don't mind looking around for loot/villagers, which is a whole lot more fun. Ah well, so it goes.
Well, they are taking a simple-ish concept many people like and are used to, and are making it extremely more complex than it used to be.
Not to mention people who have a lot of their world near their base already "explored" are going to have to go really far away for a
chance to find a place with a page that may or may not be useful, then repeat that multiple amounts of times (Because its quite unlikely you'll get the pages you want on the first go.) to be able to make a single nice, stable age.
That and/ or having to just "farm" villagers, which is just not as fun as age surfing.(To me at least, don't know about others.)
Opposed to the simple concept of "Age surfing" which was fun on its own way as well, due to its random, yet effective results. Are you gonna spawn on a cool, useful world, or are you gonna spawn in an exploding world engulfed in flames? Who knows!
Not saying the new version is "bad" or worse on its own, but compared to what people were used to, its difficult to adjust in a snap, since really people had little to no time to adjust for this.
(Maybe if he had gradually introduced the changes, it may have been recieved better?)
But I wouldn't worry too much about it, as time goes on and people make new worlds and start getting more used to it, I imagine people are gonna start liking it more, its just about giving it some time.