There are too many ships and crews all smushed together in a lot of the novels.
I agree, in Children of the Storm got almost dizzy from trying to remember who was who on the other ships (ha the character list was at the end of the book), and ended up skipping much of what one (boring IMO) character did, lol (thankfully less of him in The Eternal Tide). Some new characters on Voyager is one thing; more new ships and more new characters (tho Capt. Farkas is ok) is another. Would've liked to see more minor Voyager TV characters showing up in the books (besides Icheb and Vorik); surely a few would have been in the Voyager crew again after they got back to the AQ.