The Dota2 7.00 update has not really gone down well with the majority of the community. While not many have any peculiar problems with the UI the general consensus has been towards the inconvenience that it has caused many. In order to appease players and make the game more comfortable for them, Valve has continuously released updates to the game.
These updates are aimed at making the experience much more pleasurable and convenient for the players. The massive leap that Dota2 has taken towards a cleaner UI and much simpler to understand mechanics will help out in the long run. But the short run seems to be difficult for most of the players.