Honestly, I love it as is. It's crystal clear, showing just what I need and no more, but it still lets me access the PDF easily if I really want to. I use direct debit, but the make payment options seem clear too. If I stretch for ideas, then maybe a small grey text somewhere showing the bill value $ for the same time last year could be good, to help compare trends? Maybe also, yes, regarding point 5, it would be nice if it said that I had auto-pay turned on.