Yes, there are OTs who focus specifically on handwriting and fine motor. Or you can ask them to focus only on that.
FWIW, my older DD was much like you describe at age 5. She had low tone and motor planning issues. She struggled to do the simple things like hop, skip (could not until age 7), jump, etc. She got OT every week, and was in gymnastics, ballet and swimming to help with these things.
But all the OT and activities did not help. What has helped is time. At almost 10 she still struggles with motor planning and coordination but is much improved.
Also, many kids and many parents cannot really deal with more than one challenge/issue at a time. This is not to say that they could not have been doing more, but there can be a lot of reasons for that. While my DD has a whole host of issues, we can only do one thing at a time and be effective at it. It takes a LOT of mental energy (for her and us) to work on these things and doing too many things at once is just too hard for her.
When she was in K and 1 we did OT and gross motor.
In second grade we focused on stress reduction (which meant dropping a lot of activities and therapies) and getting evaluations.
In third grade we worked on anxiety reducing skills and individual therapy.
This year we have concentrated on social skills.
Next year I think we are going to start working on the gross motor and physical skills again.
So all that is to say that right now they are working on fine motor and handwriting with DN. That is a start. And is an important skill and a big thing to get in place with K.
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)