Obviously the previous Alderaan destruction, whilst impressive, was really all about the ‘kill Jar Jar’ punchline!
But since Adywan created that we have had two films that show ‘ground level’ as the Death Star strikes. If we care enough to see random Hosnian characters pre-strike then it’s surely appropriate to see Bail Organa, who’s appeared in 3 SW films and is the adopted father of Leia. The destruction of Alderaan is a Leia scene, it’s all about her reaction and explicitly seeing her father Bail die would really personalise it.
If it could be done well I think it’s worth including. It would connect ANH even better to RO, and also I think it would deepen Leias character and commitment to the cause, even providing more context as to why she might be an ‘ice maiden’ in ESB and closed off to allowing herself to love Han.