He was ofc very good, dont get in the Hall without being. But he did that in a high scoring era, and LeClair at his best was in lowest scoring era ever.
Best five seasons in terms of NHL point finishes:
Barber: 4, 18, 22, 24, 26
LeClair: 4, 5, 9, 9, 13
LeClair was just a different level offensively at his best. And while Barber had more longevity (~11 seasons as a top ~40 NHL fwd), and was better defensively not sure that makes up for the 5-6 year prime of LeClair in my eyes.
And LeClair has a better Hart voting record (6, 7, 15 vs 15) and All-star voting record (1, 1, 2, 2, 2, 3 vs 1, 2, 2, 3, 3) alongside that.
As I said, for me I just value peak+prime that bit more I guess!