In the GUI you will not see anything like tank/dps/healer. The only thing mysticalos pointed at is that the first time you install/use DBM (or if some new warnings/timers are added) it will use the option default based on the talents you have at that point. Meaning, if you are a tank and in tank spec and install DBM -> it will use the tank defaults. However if you are a tank but in dps spec and install DBM -> it will use the dps defaults.
To change (enable/disable) certain warnings/timers you can open the GUI by typing in-game: /dbm
On the left side of this window you can select instance/boss and a list of all warnings/timers/etc appears on the right side which you can enable/disable as you like.
PS. Your first question regarding this was on 4 January, so technically you have been waiting for 26 days which is less than a month :)
The only person in the DBM team who did some coding for the Flag Carrier targeting is Tandanu afaik. No idea how much time he has to fix it.
I think with the "start" timers for BGs/Arenas you mean the timer that shows how much time there is left till the battle begins. This DBM timer was removed as Blizzard has an own countdown in the middle of the screen already, which makes the DBM timer kind of useless. If you ment the timer that shows you how long you have left to click the "Enter battle" button -> this was broken with 4.3 and is/should be fixed in the alpha version
I think none of us speaks Russian(?) thus we are unable to help as we dont know your question/problem. Would be great if it could be translated to English (google translate doesnt make much of it either) so we are able to assist :)