That echoes my thoughts. Part 1 was kind of interesting in its portrayal of working-class life in the coal fields of England. The characters seemed realistic.
But in Part 2, it seemed like everything ground to a halt while they stopped to smell the roses.... and the daffodils, crocuses, jonquils, violets, carnations, dahlias, lilacs, chrysanthemums, daisies, .... And not just smelled them, but "touched them in worship", "gather[ed] them, tenderly, passionately", "breathed [them] ... as if she and the flower were loving each other", "caressing [them] with her mouth and cheeks and brow ... fondling them lavishly all the while", "plucked them lovingly, lingering over them ... want[ing] to drink them".
Finally, following page after page of ravishing the flowers comes the deflowering of Merriam. ... And there is nothing there. No sensuality, no sympathy, no love - just physical relief.
And it gets no better with Clara.
The sad thing is, it was probably these scenes in Part 2 that kept the book from getting the obscurity it deserved.