I quickly scanned through the finals match looking for a safety from Filler -- and to my surprise, he didn't even attempt a safety until after 1 hour into the match. All of his mistakes were going for extremely hard shots and missing and selling out.
His first safety attempt is below:
https://youtu.be/5hCpdXlkRbU?t=1h21m7s
Then he executed a good safety, followed later by the famous 2-ball shot, where it's hard to figure out what he was trying to do:
https://youtu.be/5hCpdXlkRbU?t=1h38m35s
That's it. In the entire finals match, I only saw 3 safety attempts by Filler. 1 bad, 1 good, and the crazy 2-ball that he lucked in.
Scanning his match with Jayson Shaw, I only saw 2 very short safety battles. Filler came out on top of these two by making thin cut shots that Jayson left him. Example of his first safety of the match:
https://youtu.be/NvdZiJnN3uk?t=23m51s
Match against Ruiz, first safety battle Filler won, then these bad ones:
https://youtu.be/_L8XU6FVC7I?t=9m4s
https://youtu.be/_L8XU6FVC7I?t=15m37s
Maybe going for 9-ball?
https://youtu.be/_L8XU6FVC7I?t=28m56s
Then this one, leaving the 2-ball open:
https://youtu.be/_L8XU6FVC7I?t=30m15s
Then this one. Safety, or jump-banking the 3-ball?
https://youtu.be/_L8XU6FVC7I?t=36m36s
Then a pretty good safe:
https://youtu.be/_L8XU6FVC7I?t=49m16s
Then a not so good safe:
https://youtu.be/_L8XU6FVC7I?t=51m23s
Then another attempt, where he doesn't get safe:
https://youtu.be/_L8XU6FVC7I?t=52m18s
Then later, a not so good attempt, but works to give him the first shot:
https://youtu.be/_L8XU6FVC7I?t=1h1m14s
Then later, not a real strong attempt that costs him the game:
https://youtu.be/_L8XU6FVC7I?t=1h8m49s
Followed by a bad safe later:
https://youtu.be/_L8XU6FVC7I?t=1h18m40s
Followed by another bad safe:
https://youtu.be/_L8XU6FVC7I?t=1h22m15s
I think that this is enough to make the point that his safety game is okay, but not great.