N.B.
I run a Play Based preschool program. I am not into sitting 3 year olds down to do worksheets and rote learning and specific outcome art projects and crafts. We do MANY books, finger plays, songs, cooking and many many self help skills all day long (90% of the time my kids are potty trained at 24 mos now...no sippys, good silverware use, dressing well, etc..and ALOT of manners emphasis and sharing and social skills). I do work on ABC, colors, shapes and other concepts, but it is very fluid and child directed the bulk of the time. Its what I feel strongly about and what works for me.
This is NOT what all parents want. Then an original, not chain organized full day preschool opened up very close by and many of my clients started migrating over there. 10 of them in about 4 years. It hurt my business, but I understood, and business recovered just fine. Many parents are very result-driven and have a hard time seeing the beauty of play and allowing their small children to be nurtured and given the freedom of learning thru play without the contraints of success thru worksheets.
As you can see, I have my own strong opinions on Early Development. And thats whats great about free choice. I can choose to operate my business this way and parents can choose to bring their children to me or to a more structured place.
I would discuss with your current provider her philosophy on these matters. What does she do all day with the children? No activities?...or is there a purpose to her "nothingness"...or more going on than you see? I often need to explain the "nothingness" parents sometimes feel..then they do the lightbulb "ah ha" moments and have a better understanding of how it all flows and makes sense. As a parent you will likely have a specific ideal of what preschool learning you want for your child and there is nothing at all wrong with seeking that out!
I think doing both places would be hard on both of you. JMO
Personally, I have done back up/drop in care for quite a few families who have left my care (if I have the space , of course). Its fun to see them again...and the rest of the crew that might remember them loves having someone special here for a day. Mostly, I have never had an issue, but as I said, I don't hold any ill will against the families who left me. They had a different opinion for their childs early education. They are the parent and that is their choice!
Good luck!