A stopwatch is available in game already. DBM does however remove the need to use (several) stopwatches to keep track of them. It also reduces the reliance on voice communication significantly, which is important for many players who for whatever reason struggle to use them.
For you it does, but not for the vast majority of players.
Why not go all the way and ask for a 1.1 release instead? Talent changes, working unstuck functionality and not falling through the world on a regular basis when charging all contributes to making the game easier and less time consuming. How about removing some flight paths? Disable quest/loot/reputation credit from group kills while dead? Unlike disabling all addons however, none of those things would make it impossible, or near impossible for some people to participate in all aspects of the game.