the disappointed users are mainly because the android app is not all that great... and you would be better off viewing the mobile version direct on your mobile browser than using the app. there really has not been much development on the app.
i've mentioned a few times about getting tapatalk support for the forums but so far, no dice. tapatalk would make things a bit more convenient since it is an already well known, well used product meant specifically for forum browsing and posting.
as far as why? i'm no PR agent (perhaps titillating will post an update on this) but as far as i recall the devs are busy with many other projects at the moment. there is quite a large backlog of stuff which was suggested and approved but still on the...