With current v3 now that Varka got new teammates/sets, the value of his sig dropped significantly
Now don't get me wrong, Varka's sig is still the single best upgrade you can get for his own team dps, it's just that you don't need to get it anymore.
Here's one of the new v3 Varka calcs, if you check Varka's C0R0 premium team, it's currently sitting at 147k dps, while the same team with Varka's sig is sitting at 168k dps.
Now 21k increase sounds like a lot, but going from 147k to 168k dps is only a 14% increase for your team's damage.
Considering that before all of the new stuff Varka's sig was like a 30% improvement for the team, it seems that it's value has been cut in half.
Is it still good? Of course and it's even the next best upgrade for his teams, it's just that a 14% upgrade is really not that notable anymore, and if you are someone who doesn't pull weapons generally, you can skip it a lot more comfortably
This is also not something unique to Varka, same thing happened with Flins cons/weapons once Columbina arrived