I don't want to delve into build specifics for fear of derailment, but I should at least point out that my character initiates/refreshes White Raven Tactics as a Crusader.

The sorcerer player is kinda new, so I'm not sure about motivations there... but if I were to to put myself in the sorcerer's shoes I'd be casting those spells to avoid the rockets tagging me in combat. You can't RP while dead, and the charger has offense pretty much covered.

The dex-based meleer appears to enjoy combat very much. And like I said, he's competently built. I'm most worried about marginalizing him. I think I will talk to the DM about it next time we meet up.