There should be an extra construction slot, It would be useful since having to wait a long time just for one thing to finish (Mainly Command Center upgrades) is annoying, + This so they can see.
I don't mind the constant requests for $,I don't play pay-to-win and it is overpriced but anyway, I think adding some info about the opponents dino before battles would be nice. Also make it less... Pay to win. + This if you agree.
Just build a maid every two levels and it's cheaper, I Usually just after getting a star, get some more customers to get more cash production so it's easy, Just a tip!
We've got a detailed stats sheet on the future plan, a popular feature request indeed.