I use fusion rifles more than any other secondary now and I feel they are in a pretty good place right now. They just require a bit of practice to master. I do agree there are a few issues with some of the archetypes (particularly the fast charge, low impact - I have bolts disappear from these ones all the time), and they all suffer from connection and latency issues. The latency is the most frustrating part. Some games you can hit someone square on and they'll survive with a slither of health or barely any damage at all. Other than that they are pretty good. Especially loving Plan C at the moment.