One thing that Morning Time has done for us is to make sure we get the fun stuff in first. It starts our day with some inspiration which helps us when we have to move on to the tougher subjects. We keep Morning Time short, just doing a couple of things each day, but it’s our fun time together.

Also, I’m a fan of short lessons. If things take them too long, they get discouraged, which defeats the whole purpose (to love learning). If things are taking her too long to complete, maybe the assignment is too long?
I don’t have a goal for any of my kids to finish a certain curriculum by the end of the year. The goal is progress every day. This also frees us up from the pressure of getting to a certain point by a certain time.
As far as their checklists, I am pretty laid back. If I can see that they have worked hard/done their best on certain subjects, but it’s getting late in the day, I am ok with letting a few things go. The things that are important to me that they get done every day are math, reading, and writing.
I thought of a couple of posts I’ve done that address your question more specifically if you want to search for them.

How to Make a Workable Homeschool Checklist
Our Homeschool Routine |Day in the life of a Mom of 9
How to Simplify Your Homeschool With Morning Time