Some GMs are excellent, understand the game and what we are trying to achieve, have a good grasp of what can affect gameplay and people's accounts and make very good calls on how they handle situations.
However, not enough GMs are in that category, and there are some who fall far short. The good ones need keeping, and need to be allowed to train the others, but the feeling I've got from personal experience and through reading various is that is not happening - or if it is, it's woefully slow, and disrupted every time some idiot in accounts insists that they cut back resourcing for UO. Customer service is always on the hit list.
Too many of the GM staff do not know their job properly yet - they don't mean to upset customers or make poor calls, but they do because they are insufficiently trained, not experienced about UO, working from poorly written and outdated 'canned response' instruction sheets, and probably feel (as far as I can see, with justification) that EA/Mythic regards them as easily expendable. When the customers raise hell about poor customer service, that hurts morale in the QA and GM staff... but, even allowing for the fact that whatever they do some people will pancake and moan about it, there are genuine problems that need resolving, for the benefit of all of everyone.
EA might hang on to ticked off players who keep playing but never call the GMs again, but that's only acceptable in a business that thinks it's on hold and concentrating on a managed slow decline of the product. If all the stuff about 'improving and advancing' UO means anything, there needs to be the investment and a visible result for the customers from that investment.
Solving a problem means allocating resources in staff, money and/or time, to fix it. Whether that's possible within the EA structure, I don't know, but experience to date is not reassuring. We've had lots of words, but those are cheap and easy. Actions are lagging way, way behind, and those are what matter.
It's not a problem that can be fixed quickly, I appreciate it takes time to sort it out, but EA/Mythic have had plenty of time, and there's not that much, if any, sign of improvement.