I'm honestly confused by the complaint. Speeding up the time it takes to revive a defeated player in combat would lessen or remove one of the few incentives this game has for good play.
Reviving from death while still in combat is not supposed to be easy or quick, in fact the game actively discourages it. That's why the downed state exists, that's why rallying exists, that's why enemies telegraph their biggest attacks. If you're defeated (as in "fully dead"), the game is forcing your allies to make an interesting on-the-fly decision between stopping their DPS and sitting stationary for 10–15 seconds to bring you back, or to focus their efforts on finishing the encounter.