I love rightstart too. I decided to do it next year again with a 3rd, 1st, toddler and baby….We’ll see how it goes. We are doing RS2 levels D and B this year. I am following this thread.
A few years ago I tried Abeka…won’t recommend that….and it took about as long for me to do. I figure k-3 or so must be mom intensive no matter what. That is why I am doing Rightstart again this year. I am going to try to have my ds in level D do the worksheets more independently. I also substitute drill worksheets (kumon or make my own quickly) for some games. I also play games with both kids. It’s up or down in skill for 1 of them, but early exposure is good as is easy practice;)
As far as what to switch to I’m not sure Kate’s homeschool math has detailed reviews of several programs. I have heard that BJU math is good and at least one Mom switched to it from Rightstart. http://lextineclectic.com I emailed her we about it and she found it to tedious to just grade and not teach, but she was using to distence learning. She went back to rightstart and teaches multiple levels with ideas for how to do it.
I know Bob Jones teaches the why and flexibility with numbers. My sister in law uses it k-2 with her kids and another sister in law teaches it at a private school. I would look at it as well as Math mammoth, and perhaps Singapore….but I really didn’t like the singapore essentials books. Good luck..pray about it.