So what I saw in the game was that Thornton was asked to play a more traditional safety role for much of the game, and Poyser was playing the Nickel, and Day was the deep safety, often in a single-high look.
I’m not defending the tackling, but Thornton is not playing his best position at safety unless he is in the box basically all the time.
One thing we have to remember is that sometimes coaches are forced to play guys in less than ideal spots, and it impacts the success the player has. Sometimes it is not the fault of the player, or even coach. Injuries have created some wonky lineups.
To use a basketball analogy, if the Heat are forced to play Giannis at PG because of injuries, and he struggles, does that mean Giannis is no good, or that Giannis is not a good PG, but remains a very good PF? Every player has limitations.