Reusable/centralized variables for message text across automations?

Hi there so I keep running into situations where blocks / parameterized text that I use across tons of automations; I decide could be tweaked by adding some more parameters and text.  I then have to go through ALL of those blocks across almost 50 automations and update the text in those blocks 1 by 1. Is there anyway to solve for this?  

For example this Action block that sends me an email uses message text - and I just had to add “From {{entry_channel}} {{entry_surface}} -- Keyword: {{entry_trigger_id}}” and now I am manually updating ALL of those blocks.  Instead of the message essentially being its own variable or something. 

Does anyone have a pattern / solution for this?

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{{full_name|fallback:"Contact"}} appears to be requesting support  or is following up related to the {{entry_intent}}

From {{entry_channel}} {{entry_surface}} -- Keyword: {{entry_trigger_id}} 

IG: 
{{ig_username}}

Message: {{triggering_text_input}}