Struggling too, and rather annoyed with the Guardian. There are plenty of "solve, then alter" crosswords around, but I avoid them - I like to solve the clue, then write the answer in.
I've solved about 10 of the straight ones. I've got answers for 3 of the "others", but haven't decided what to write in. For instance, is 28d CAGE, COOP or CRIB (or something else entirely)?