Hi dmiles, I know exactly what you are going through. To be fully transparent I used CMEG for about 1 year exactly and before that SureTrader and various other full service brokers.
My experience was mixed, CMEG did have some of their broker rule changes and auto account wind up liquidation changes without informing their clients by email beforehand. Basically, they were changing their rules on the fly without giving notice and that 'messed' up some of my trades. I was holding some positions overnight during that time. I have had issues where trades got rejected for no reason and tried calling. CMEG is exactly what you said, when it works, it works fine, but when there are issues, getting a response can been difficult.
When they first started back around Feb 2018 I dealt with their clients services directly and they were EXTREMELY helpful in answering all my questions. I did have success with wiring money in and out of CMEG within their time-frame but requesting statements was received with some dislike on their end. They only had a few dozen accounts at the time and I have no idea how much they have grown now but it could be an under-staffing issue.
I have an IB account also now as a domestic broker is more reliable and their customer service is superb. Frankly, if you are just starting out, the PDT rule is probably for the best, and having unlimited day trades with a very small account offshore can be risky to account blowup. It was for me and I have learned to be better for it.
And yes I agree, a confirmation email on all requests NEEDS to be sent to clients, that is unacceptable service on their end.