Essentials is the kit. I am still scratching my head over how it's different to pay $7.99 up front or $7.99 in app. As has been mentioned, you can try it out for free and move on if it's not for you - I prefer that myself. No wasted money up front. No obligation to buy anything later.
OR they could have put out a free version like they did with the limited functionality and a paid for version where people don't feel like they'll have to keep on buying and buying. Obviously you don't see the other side and are not going to change anyone's mind.
I respect your decision, you should respect those that don't care for IAP. It really isn't that big of a deal anyways. Those that don't care for the business model will just move on and those that don't mind will support it.