The options I showed you, you set them as part of the shortcode like the examples shows on the page I linked you to. You do not edit the template files.
Literally hundreds find Excerpt perfectly suited to their needs. Take this site for example. This is the original Except template, not the Plus. All they wanted was the bio excerpt and full bio. Not weird at all.
The great thing is, if you want to show more than just the bio, you just turn it on. Since you just typing some settings in the shortcode, it’s upgrade safe. I test Connections before every update with every template under a wide variety of options just to make sure templates doesn’t break. Now, if you edit a template, you will not lose it dugin a Connections update, but, if you update the template, you will lose any code changes.
What makes you feel you chose the wrong template? Do you like the way it looks? You just want more info to display, right? Use this shortcode on your page:
[connections show_title='TRUE' show_org='TRUE' show_contact_name='TRUE' show_addresses='TRUE' show_phone_numbers='TRUE' show_email='TRUE' show_im='TRUE' show_social_media='TRUE' show_dates='TRUE' show_links='TRUE']
All the templates shown on the template product page are exactly as they are sold, nothing custom. Same for the template demo pages. On the template demo pages, the shortcodes used for the demo are given. Sites linked to on the template product page are too, out of the box. The only differences would the shortcode options they’ve used. I do this so everyone can see exactly what each template is like both in demo and on real sites so they can feel confident on what is being purchased. The Showcase page, yes, those are custom, but I do put that right in the description. Sorry that I somehow misguided you, but I do try to make sure everything is presented and nothing is hidden.