what do they mean when they say she can "easily" switch between ranged and melee? Is she a stance changer? or does it mean that she also works well with melee weapons? Or perhaps she can still handle her self when people get up close?
They are saying she works well from range and melee. The thrusters will allow her to move around the battle field to fit whatever weapons abilities and playstyle you are using. You can use a weapon or range weapon and with her healing she seems to have a good amount of survivability to combat enemies.