I am fairly new to DM'ing and I am going to be running a simple one shot soon. I intend to start the players at level 3 so they can enjoy the more entertaining class features and not be so squishy that the chance of a PC kill is likely while still presenting a minor challenge.
One of my equally new players wants to run an artillerist artificer and heavily use a gun-esque Tiny handheld eldritch cannon. Tasha's states that
"[they] can take a bonus action to cause the cannon to activate..." and "As part of the same bonus action, you can direct the cannon to walk or climb up to 15 feet to an unoccupied space, provided it has legs." (Tasha's, pg. 17)
My question is would allowing the player to manually aim the cannon in their offhand in the firing bonus action be a fair equivalent to aiming the cannon through it's movement in the firing bonus action. If so how would be a decent way to balance the high damage output of them using a standard spell or attack in combination with the 2d8 damage of the cannon being fired with force ballista (Tasha's, pg. 18) as a bonus action and avoid dramatically outperforming other players.