Anthony had the worst season of his career last year with the Thunder. While it was expected that his overall scoring average would drop, playing next to Russell Westbrook, Anthony had the worst shooting percentage of his career at 40%. However, he shot 36% from downtown, which is around in line with his career averages.
Interestingly, Anthony shot more threes as a percentage of his overall shot chart than ever before in his career, taking 41% of his shots from beyond the arc. In 2016-2017 with New York, only 30% of Anthony's attempts were three-pointers. This probably isn't too surprising considering the fact that Anthony was not the first option on his team for the first time in his career.
88% of Anthony's three-point field goals last year were assisted upon, a figure which, while higher than Anthony's career average, was not the highest of his career. In 2008, 98% of Anthony's makes from beyond the arc were assisted. This is all to say that Anthony is tremendously comfortable as a catch-and-shoot option, most famously evidenced during his time with Team USA.
The main question pertains to his defense, which is only notable due to his inabilities. Last season, Anthony finished 73rd among all NBA power forwards in DRPM at -1.25. However, for comparison's sake, Ryan Anderson was 81st, with a DRPM of -1.96. Elite teams like even the Rockets themselves hunted out Anthony in the pick and roll, feasting on his slow-footedness. But presumably, he would be replacing Ryan Anderson in the Rockets rotation, a player he isn't any worse than on the defensive side of the court.
Even with his baggage and the issues presented due to his defense, I'm of the strong opinion that Anthony's scoring ability in the mid-range would be a boon for the team. He still shot 46% on shots taken between ten and 16 feet last season. When the threes completely dried up in Game 7 last year for Houston, they could have desperately used someone who could score from somewhere else, with Chris Paul sidelined.