As I was saying my issue is with pilots who are given a when ready descent clearance from the cruise with a speed restriction and don't descend for a good 10-15 miles. Then just speed up to make the level without saying anything. If you can't make the level without speeding up then I need to know. You guys are the ones with your hands on the controls and if you think the restrictions given are unrealistic then I take your word for it and will come up with an alternative plan as appropriate. But just speeding up is not acceptable.
As wiggy says I guess the biggest issue here is communication or lack of. Let me know what you can and can't do and there's no issue. But just ignoring me is of no benefit to me or you.