Hi @dnavarrojr
Thanks for the post.
For ACF to render the shortcode markers, hooking into the acf/format_value is enough I am not sure why your shortcode is not being rendered.
How have you created you shortcode marker using the shortcode API?
Please refer to this codex when setting up your shortcodes: http://codex.wordpress.org/Shortcode_API
For ACF’s simple text values, the following syntax should be used:
[acf field="field_name" post_id="123"]