What we need for a successful career is chops that can consistently handle brutality, and yet be able to preserve subtlety.
A teacher of mine used to give the following advice, "When you have to play Mahler, practice Haydn and Mozart. When you have to play Haydn or Mozart, practice Mahler." (I would have welcomed some more specifics, but his point was well taken.) I say, how about practicing some Haydn and Mozart everyday regardless.
Control of soft dynamics is a necessity. Days and weeks should not go by without secure contact with pianissimo notes. You should be able to perform a successful "soft check" at any time.
Thankfully there is a cure for the deadly smash-mouth ailment. Other than rest and good air flow, it is soft purity. That's it. There is no treatise-reading required, or any guru-seeking necessary. Just practice Haydn and Mozart!
Trumpet parts simply require command and control. Flamboyant cadenzas and great soaring bravura lines are for another day. For the health of your chops, practice clarity, security, and dependability, one note at a time. And don't forget to play softly!