Title clips provide great customization functionality, while captions are easier to manage.
I suggest to add a “template caption” feature, which is several template titles with text and timeline from the captions, combined in a single clip, and can be post-processed like other clips.
This combines the customizability of title clips and the simplicity of captions.
In simpler words: one template caption clip + captions = several template titles in one clip generated from captions and a template.