I wonder if by "the Hobbit epic" they meant The Hobbit and LOTR combined?
As a kid I was utterly enthralled by The Mewlips, and the end of The Sea Bell still really moves me, but it doesn't surprise me to learn that it was rushed together. Although there was time for Pauline Baynes to do her usual marvellous work, so you'd have thought Tolkien would have a bit of time to work on his scansion?