I want a full screen animated quick time event that pauses until you decide how to resolve the reaction and then action resumes accordingly.

Ugh no. Please no. Full screen?
Imagine it.
Level 6 rogue hit by goblin 1. Full screen animated qte. Uncanny dodge? Nah. Goblin only does like 8 damage. Pass. Goblin 2 hits. Same thing. Goblin 3 hits. Same thing. Minthara hits. Same thing. Giant spider hits. Hmmm... maybe I should finally use it. Okay.
Now add a few more reactions to that if your mage knows Counterspell or Shield or Absorb Elements... plus AOO triggers...
Yeah. No thanks. A small unobtrusive prompt would be better, and maybe some presets to cut down on prompt frequency please. Like a preset that Uncanny Dodge would only trigger a prompt if an enemy does more than 10 damage and Counterspell only triggers a prompt for select spells you choose.