User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-17735225-20130922102619/@comment-17735225-20130922120038

@RyanZinogre I just checked Garara ajara and for the love of White fatalis why didn't I noticed that before.

But I have an argument for that; the digging mechanic in MH4 right now only works for low leveled terrain. In this video here http://www.youtube.com/watch?v=RGNRCcvIyWw at 2:30 Garara used a digging attack  and it surface at the 'edge' of lower ground and burrow into the terrain again, only to surface on it. Why didn't it just surface beneath the hunter directly? Because that second burrow is the 'climbing' animation for it. Some monsters like Diablos won't look pretty if they have to jump from ledges to another like a dolphin. Also Garara seems to only travel around the flat area, maybe to not mess up its digging behavior (This could been disproven with video of Garara in underground cave so someone please give the link if you can find it).

@ArcEarth In games development, even if it's just one simple mechanic, if it can't be finished/perfected in time, it can pretty much affect a chunk of contents in a game.

I could be completely wrong about this though, but I speculated that these monsters are being saved until the digging get perfected. Maybe in 4G? When burrowing through walls/ceiling are finished?