Well, remember the screen off memory leak, everyone welcomed it as THE FIX for the memory leak affecting the N5 and rushed adding it.
I was the only one actually testing it and telling that wouldn't fix anything. The time proved me right as people are still experiencing the leak even after everyone added that fix.
With all the above consideration, don't rush to conclusion, i've not take a look at it yet but a Google engineer already stated it's working as intended so... take your conclusions, until something changes.
Xposed framework is a brilliant and remarkable project but it comes at a cost. Beside the overhead it creates the lollipop version is more invasive cause it disables for example some ART optimizations.
I'd use it to modify on-the-fly third party apps but only if i can't live without, not to modify GEL for example, where you could just use another launcher.
It's also good for phones who are not supported by developers cause too old or cause touchwiz and such.
Using on a Nexus device is just silly to me.
Take this with a grain of salt but i'm not sure if in the long run using it to gain more battery using some battery modules will actually gain anything then using the phone without it.
Said so i'm not the kind of developer who will bash users using it or not giving support to you, just consider the above suggestions.
I always welcome more options on the scene and don't like those devs who are yelling at Xposed as the death of custom roms or as an headache for the bug reports.
I'm trying to add some xposed pearls on Cataclysm just for this reason, like custom dpi/locale/tablet mode.
I've rewrote again the custom dpi feature, some apps glitch like Ingress are fixed and now the feature is 100% efficent.
There's only one last bug that is needed to be squashed, nedless to say that i'm working on it.