+1

i doubt that it will be in the game at launch, but i dont see why its not something that could be modded in if larian/wotc allows. sure a gunslinger may seem 'off' in the FR setting and i wanna say the gunslinger class is still 'unofficial' content, but im pretty sure the FR has a blackpowder equivalent so i dont see why it couldnt be included from a lore perspective - its more a matter of how larian implements it that i would be concerned with. my approach would be to reflavor crossbows with maybe higher dmg output but shorter average range, still have loading limitations (maybe even increased to balance dmg output), and maybe throw in some self destruct mechanics if you roll a nat 1 (id even scale it the 'heavier' the firearm, ie handgun(xbow) roll a 1 self destruct, lightgun (lightxbow) 1-2 self destruct, etc) to represent the volatility of such weapons. i wouldnt want to make these weapons too op, but create them so the could mechanically fit into the game (i would be really against turning all firearms into grenade like launchers tho, and just be able to blanket a combat encounter with surface fire - but that is another thread)

i used to also be of the mindset that guns arent medieval/fantasy, but kinda got over that the more i dm'd and realized that dnd isnt just 'medieval fantasy'. sure that could be the theme or rules you have established for your campaign/group and all the power to you if you prefer playing in a more traditional fantasy setting, but you have the capacity for all kinds of different campaign scenarios within the FR setting so if one player wanted to play as a gunslinger i would see that more of an opportunity to think about how i would incorporate those elements into the campaign, but of course that is pnp/tabletop and can be difficult for larian to incorporate for a video game (particularly since again, the gunslinger is 'unofficial').