I strongly disagree. Narratively, it would make BLM feel like a clumsier and cruder job - we'd have fewer spells to choose from, and lose access to distinct pinpoint vs. wide elemental effects; I like feeling like I have a lot of spells to choose from and need to use my expertise to pick the appropriate one, and like I have fine control over my magical powers rather than can't help but spill fire everywhere. Some spells, like Flare Star, are so powerful they can't help but go boom, but if EVERY spell were like that it'd feel like we were incompetent to wield our own power.

Mechanically, there are fights in which you DON'T want to deal splash damage to avoid breaking something's CC or accidentally pushing a bomb onto the wrong platform or whatever. Obviously this restricts us from using Flare Star in such cases, but it shouldn't restrict us from attacking at all.

Practically, it is much easier to change the execution requirements of two actions than to change the effects and animations of like six different ones while deleting several others.