The best thing about Openreach is that both companies can have plausible deniability over the other. Here's a real world example that is costing a business money, lots of money:
Call up early March to open a business broadband line to the shop with an extra feature line and 2 phone lines. This will allow the company to operate it's web business which is where a lot of the business is forecasted to be. Upfront, a bond is paid and the initial subscribers feeand all is fine and dandy. 4 months later and these are the results:
-Nothing has been installed
-3 visits just to check the viability, not install, not route cable, just to check
-4 visits that were meant to occur to INSTALL the lines and failed because they could not gain access to a shop that is open 9-5 on top of that the business owners will have been in since 7 because they know what BT is like. They didn't ring the store, they didn't try to find the store and they pretty much just wanted an extra lunchbreak so just blew them off.
-No recompense for the ridiculous wait time (sorry, one months line rental on just a single line free)
-A variety of other things that have led to an incredibly hampered startup for the shop
And you know what, there is absolutely fanny adams that the business owners can do. BT don't take responsibility and neither do Openreach. It's an absolute farce. Commercially they've been horrendous in all but one of my experiences and colleagues.
If Openreach was a separate company and not layered into a subsidiary with BT as it is now then it would be a good thing.