Naah, if it's your money then you ARE the customer so it isn't up to you to explain anything to your new FTO - it is up to them to win your business so they should be bending over backwards to impress you not the other way around!
Maybe you need a different style of instruction? Maybe a smaller school with more personalised tuition and fewer (more experienced) instructors might be they way forward for you. Everybody learns at a different pace and 8 instructors in 30 hours seems like an awful lot. Why go integrated anyway? There are lots of other options. That would let you get your PPL then you could go off on a modular course and save yourself some money.
I don't know if you're cut out for flying, but maybe you should just go find a good instructor with lots of hours under his or her belt and do some flying with them? Maybe do some general stuff, some circuits and maybe some time under the hood. They should be able to give you a reliable second opinion.
There are loads of FIs on this site so they will hopefully be able to help you more than I can.
Good luck and get flying!!