I believe these adjustments are moving in a positive direction. Both Felon and Phoenix pose a significant threat when deployed early, and they are challenging to counter due to their versatility.
Concerning Felon, I propose that reducing their speed could serve as an effective means of balancing their capabilities. However, increasing the shield cost for each shot is not advisable, as they currently inflict more damage per shot than the shield they consume, which favors shot first in Felon vs Felons. This dynamic is beneficial for the game. Perhaps reducing their damage per second while introducing splash damage or chain lightning could be good.
Additionally, I found that the fire-at-shields setting did not function as intended when tested with Ronins.
As for Phoenix, the primary issue lies in their difficulty to counter effectively. The proposed adjustments do not sufficiently address this challenge.