She should have a sniper shot power like Jane. Except this one comes with -75% acc for 3 turns, as well as immobilizing the unit for 1 turn, with 1 round bleeding. This is a counter against an OP Nausica. She should also get a +15% dodge for every time she trains a return fire, and 5% there after for each tier of return fire. Return Fire should be like riposte and do 1.5x damage.
Although I would like Bonnie to have a longer range attack, replacing stock assault would take her close attack away from her.
Think about this....
All musketeers (rifleman/marksmen) .. even in real life, can use their musket/rifle to hit close attackers. Not all musketeers (rifleman/marksmen) .. even in real life, can shoot at extreme range.
I can see what you mean but she still has her stock assault epic, (sometimes its good, but most time it can kill your bonnie) Extreme range can help in any situation with no detriment. Stock assault power is good for utility but often times I don't use it. Extreme range will just be so useful. This is just a suggestion though, question is Doc, if they changed it would you be against it?