Originally Posted by _Vic_
The fighting style with shields "Protection", the lore bard´s "Cutting words", the "Defensive duelist" feat, Battlemaster´s "Parry" and rogues "Uncanny dodge" of the PHB are also reactions.

And if they end up using Xanathar´s, an official extended-rules book of WOTC that it´s been for three years you can add the druid of spores halo & more spells like gift of gab, absorb elements, etc



For initial release only the Player's Handbook has been confirmed so it is irrelevant how long other source books have been around.



Good catch on the additional usages but as these are for non mage classes they are only competing with attack of opportunity which could be handled by the currently proposed system.

I'm not saying the current implementation is going to be perfect and given infinite resources and development time an interrupt system might be better, however I'm not convinced an combat system overhaul is necessary for what IMHO is going to be a minor impact on game-play.

I'll be able to give better feedback after Early Access.