With the new update, the default Lightning Gun (LG) damage was nerfed from 7 to 6. The new weapon, the Heavy Machinegun (HMG), is also enabled by default. Please visit the following link and vote for what you prefer:

http://strawpoll.me/2445655

It is also worth mentioning that the HMG does not do more damage over time compared to the LG, even though it might seem like that at first. The LG does 6 damage and ticks at 20 Hz, the HMG does 8, but ticks at 12 Hz. That means the LG does 120 DPS, while the HMG does 96.

EDIT: I went ahead and reverted back to the old settings on my server. 7 damage LG with the HMG turned off.