"I asked Microsoft if the company would be able to comply with unlocking a BitLocker disk, given a legitimate legal request to do so. The spokesperson told me they could not answer that question." - https://firstlook.org/theintercept/2015/06/04/microsoft-disk...
If you bought a security product and the developer of it describes its strength as "No comment", would you trust it? Personally I am sticking with the abandoned TrueCrypt until a successful fork has been created or luks + dmcrypt has been ported to windows.
There have always been companies that share source with customers, use stronger security tech, warranty their code, and so on. They were minority players pre-Snowden with many having left that market because so few cared. (myself included) Post-Snowden, they're still minority players with the market mostly going for whoever promises the most on their web sites & in media. Trust and security have always come 2nd (5th?) to all kinds of other criteria for buyers in the IT market. If you doubt, look at number of Facebook or Gmail users vs number using more private alternatives. People & companies sell themselves out in droves.
There were earlier stories from a developer building Bitlocker indicating the FBI did want a backdoor at the time but ultimately settled for this.
You can avoid sending the backup key to the cloud, but I'd advise to keep a backup of this key somewehere: I have had to use a backup key on several occasions after a bad reboot.