Yes! I hate those slanty pockets and I ALWAYS sew them down, really unflattering on me.Like Hazle, if the trews are otherwise good, I buy and sew down.
I have those H&M trousers, on me today in fact. I know what you mean by catching the light but when you wear them there's no great sheen off them. I really like them. They are quite slim fitting, but no pockets and side zips make them good for pears, as long as you have a flatish tummy, They are ankle length on me. Even good ole H commented on how flattering they are. And he notices NOTHING unless it's dramatically good (or bad).
Gap true straight are also good, size down.
The JAPO Mango ones are a nice shape and fit too, I will be purchasing in navy. Belinda really rates them, size down 1 if not more sizes. They have no sheen.