I am not going to go onto statsguru, but what were Holding's shortcomings? Did he lack accuracy?
Not remarkably so. Holding's principal problem was that as his career progressed, his hamstrings got weaker and weaker. Holding's best phase came very early on - his first series in Australia was a premature elevation (he'd been taken on the tour with the aim of learning more than playing but ended-up shoved into the front-line and averaged 61.40 in the series) but in his next two he destroyed India and England taking 47 wickets in 8 Tests at 15.61.
However, even in 1976 he'd missed one Test with injury and he missed the entire next series against Pakistan a year later as well, with Joel Garner getting his debut as a result. And because he, like most of his team-mates, joined the Packer Schism he did not play again until 1979\80. From then until 1986 he was still a phenomenal bowler, but missed another series in Pakistan (as did Gordon Greenidge) in 1980/81 and as a result never faced them at all, something which is always a must for a bowler wishing to be considered at the very top of the tree. Why he (and Greenidge) missed this series I've never been sure.
He missed another 7 Tests after 1981, and should have played his last game against England in 1986 as West Indies triumphed 5-0 in possibly the most one-sided five-Test series ever. However, he played one more, failing to take a wicket, and that was it.
Finishing his Test career, essentially, at 32 is younger than most; he played just 54 Tests between 1976 and 1986, and while his record (
239 wickets at 21.69) stacks-up brilliantly, there's another little hole hiding there: as well as never facing Pakistan, Holding played just 6 Tests against New Zealand and was distinctly moderate in them, taking just 16 wickets at 28.37. This isn't entirely a fair reflection, as it's come to be regarded as historical fact that all of West Indies' bowlers were cheated out of numerous wickets in the infamous series of 1979/80 by execrable Umpiring.
As a result, Holding's Test career for the overwhelming part consists of just 3 teams: England; Australia; India. This falls short of his contemporaries Marshall and Garner.
EDIT: I see Slifer has beaten me to several of these points in a shorter fashion.