[Q] Manual exposure in Google Camera's HDR+? topic

In my Nexus 4 I used to be able to set manual exposure in HDR mode, which super powered HDR to tremendous flexibility. I would normally take shots at -1 or -2 to ensure highlights had plenty of data and HDR would take care of bringing back shadow details. Match made in heaven to the glory of my instagram portfolio.

Now that I switched to a Nexus 5, manual exposure is just gone from HDR+. I believe the problem lies in the "+" because I had no HDR+ in the Nexus 4, only standard HDR.

Anything I can do to make manual exposure available in HDR+ or disable the "+" mode in the Nexus 5?