What you are describing is probably normal, but I'd keep an eye on it. If I compare DD's writing from first grade to third grade, I don't really see any progress. DS7 has developmental coordination disorder and he can write neatly, with approrpiate spacing, letter formation, etc. but has to put an unusual amount of effort into it and he can get very sloppy. His pencil grasp is very awkward looking, he is stiff, tongue sticking out, etc. His writing from K and early first grade looks shaky, but he had a traumatic brain injury at that time so it's hard to tell how much is from that. He also has a tremor (that is not obvious to me).