yeah probably but it would be decent to move around blowing everyone up, if they are like the GBA games they would only usable very few times and, like you said, just in one spot
imagine if they added Jake or Beck from SD, you just blow up the enemy from afar with a ballista i know there is no chance but still characters like them and Xane would definately make combat interesting
having many chapters with fe4 size maps with a more mature story and voice-acting would be amazing.
also add in Thracia's fatigue system for the units to make more interesting gameplay