The problem with Ultralisk in the TvZ match up has been heavily discussed in the previous weeks, and I believe there are more things we can look at instead of just nerfing Ultralisk.
While others are studying the builds in the recent TvT games, I am actually more interested in the choices and transitions in general. The early game dynamic of the Terran mirror match has changed in Legacy of the Void.
The first Legacy of the Void balance patch is finally here.
Reaper openings can be considered the most common openings for all Terran match ups. While these openings have been well established in Heart of the Swarm and brought over to Legacy of the Void, the new changes in Legacy of the Void have created more variations to this bread and butter opening.