Well, I absolutely agree with the hyperlink idea.
Anyway, what I'm saying is that I'm not so sure I like the multiple statblocks in one entry now that I'm involved in the guts of the system on a day-to-day basis. It doesn't make as much sense, given the database, to have some critters purely in the html description section. (Well, like I say, with things like the elementals, maybe it's too much to have them in separate entries, but anyway...) This seems to be a change that started somewhat arbitrarily around 2010 sometime, and there are plenty of examples of split critters. For example, the lesser and greater plumazotl, lesser and greater sea wyrms, lesser and greater thassalos, lesser and greater well spirit, least and lesser and greater guardian yugoloth, etc. (And those are just ones that aren't so different from each other.)
Most of the monsters with Lesser & Greater versions are like that because their AD&D originals were divided into Lesser & Greater creatures, and the Least/Lesser/Greater monsters also mostly had multiple statblocks in their AD&D incarnations too.
The Quakebeasts had an age category table in their original presentation, similar to a Dragon. We're not giving Dragons separate CC entries for every age category, are we.
Besides, it just seems inefficient to me on a "monsters-per page" basis. All three of the Quakebeasts would have to have a copy of the background/combat text, which seems needless duplication. That'd occupy a lot more space if we turn it into a pdf or if anyone wants to print them out.
That's more a personal preference than a serious obstacle though - they don't occupy much space in their digital CC version.
A more significant reason is I don't fancy rewriting the combat entry to make three different versions for each age category.