Solasta has adopted reaction in the most literal way possible, as close as it can be the the source. I don't know if it is the best way possible to do it (probably not), but it's still a hundred times better than what Larian did, which is pretty much ignoring the mechanic completely.
I made the comparison to a yu gi oh game that doesn't have trap cards or effect monsters and I think it's the best way to think about it. It removes too much of the game