Here are the problems I have so far:
1) As with the betting history screen changes from a couple of weeks back, you have lost the ability to choose which page to jump to so you have to scroll through dozens of pages one by one to get to the market you are looking for.
2) Seems to be a significant limit on the amount of data you can return in one date search. I searched for 13th to 19th (last week) and it only brought back 170 markets when I traded in over 1000.
3) The individual market screens now report the 'requested' odds and volume matched rather than the 'matched' odds.
4) I have seen examples of missing data. eg I now have one selection that apparently I managed to match at odds of 0.00

5) The country codes on horse racing and greyhounds (at least) have been removed so it is no longer possible to identify or sort by country unless you know all the tracks by heart and can manipulate a spreadsheet accordingly.
Why do BF spend time and effort fixing things that aren't broken while ignoring the things that are?