I worshipped Claremont growing up. I practically learned vocab off the man. I still have intense love and respect for his older work. For all its mess and excesses, I thought it was regularly brilliant.
That said, some of his tics are his own, and do not date well. Yes, I know the conventional reasoning of the period. But even though that was the expository style of the time, Claremont took it to a new height of verbal diarrhea which he continues to do today, years later. So it's not simply a product of the era, it's about him. He is still using the same lines about "you'll love being a slave" twenty to thirty years later.