I've always found that powertochoose.org provides accurate information about electric rates. It's the rates themselves that are complicated. They tend to be piecewise linear in usage. In other words, fundamentally, the amount you pay per kwh depends on how many kwhs you use, and, depending on the plan, when you use them; i.e., days, weekends, evenings, etc. It would be very simple if all the electricity providers were compelled to offer you the same price per kwh regardless of how much you use, but they aren't, so they don't. I'm reminded of the old Braniff Airlines ads where Wilfred Brimley would remind us that "every seat on the plane has the same low fare". We all know what happened to Braniff. They went bankrupt, because, among other things, it's not possible to make money in the airline business by offering every seat for the same fare. It strikes me that something similar happens in the electric power business, but the drivers are probably different.
Anyway, powertochoose.org provides you with a cost per kwh for three different usage levels: 500, 1000, and 2000 kwhs. If your usage is equal to any of those, then you know what you'll pay per kwh. If it's not, then you don't. It would be nice if powertochoose provided a tool that allowed you to calculate rates per kwh for any usage level for any provider, but it's easy to see, I think, why that would be impractical. The site does, however, provide you with the details you need to calculate that rate yourself. I've done it in the context of an Excel (actual an OpenOffice Calc) spreadsheet. When it's time for me to choose a electric power plan, I gather my past usage per month from SmartMeter and apply the rates offered on powertochoose as modeled in my spreadsheet to those rates. I now have average usage per month going back more than five years, so I can forecast my usage each month pretty accurately. It's then straightforward to choose the best plan for me, given my usage. I've never been surprised by a bill being different from what I expected.
Except for the wintertime, I use a lot of power, close to 5000 kwhs for a couple months in the summer. I have a pool and a 20-year old two-story house which is not as well insulated as modern houses are. The best plan for me is very different from that of a neighbor who uses far less power.
I wouldn't want the government to go back and legislate rates, and that's, in effect, what would happen if providers were compelled to offer power for the same price per kwh, regardless of usage. In light of this, I don't know how powertochoose.org could be made any simpler to use. Of course, YMMV.