If Wiggins becomes peak Caron Butler and sustains it for more than 3 years, he'll have had a successful career.
I guess that'd be successful for most players, but I'd consider peak-Caron Butler a disappointment for Wiggins.
Butler's best three-year stretch in Washington (20/7/4 on 46/32/87 splits) covered his prime years (26-28) when he was playing over 39 minutes a night a game. There's not a snowball's chance in hell Wiggins is only scoring twenty a night playing close to 40 minutes while hitting 32% from deep in his prime, he's already scoring sixteen and shooting 34% from three as a teenager.
That age gets taken for granted here. Wiggins is finishing up his age-19 season, when Butler was the same age he was at a playing at a prep school in Maine. Butler didn't get to UConn until he was 20, and he didn't start playing in the NBA until he was 22. Even then, despite being three years younger, Wiggins was still arguably better than Butler as a rookie.
Wiggins : 35.0 MPG, 15.9 PPG (44/34/73 splits), 4.3 RPG, 1.9 APG, 1.1 SPG, 0.6 BPG, 2.0 TPG
Butler : 36.6 MPG, 15.4 PPG (42/32/82 splits), 5.1 RPG, 2.7 APG, 1.8 SPG, 0.4 BPG, 2.5 TPG
Where are Wiggins' numbers going to be in another two years when he's 22? I'm of the opinion he makes a leap like Paul George did, he's already further along offensively than George was during his rookie season. George was the better defender, but he was also playing in a much better defensive system surrounded by other plus defenders in George Hill and Roy Hibbert. Wiggins isn't lacking some intangible George possessed, they've both taken pride in their individual defense from the start of their careers. It's not hard to envision Wiggins being a regular fixture on the All-Defense team in the future, his physical tools are that elite.
Wiggins will play more small forward as he fills out, which would increase his rebounding opportunities and better utilize his length and shot blocking ability (he's already blocked more shots in 60 games than Caron Butler ever did in a full season). IMO, and even being conservative, statistically he'll easily blow past what Butler was doing in his first three years in the league.
Most Cavs fans don't like to admit there's a chance by the time Wiggins is 26-28 he's one of the best players in the league. That's why the Caron Butler comparison seems so low. I'd be wildly disappointed if Wiggins peaked with a couple All-Star appearances as a complementary player on a few 40-win teams, he's shown the promise to be much more than that. Wiggins' run in February (20/5/3 on 47/34/79 splits) might have been the best stretch of basketball a rookie's played in years.
I think it's telling we've moved past the point of questioning whether he's going to be a good player; the question now is just how good he's going to be.