First of all, thanks so much for the theme. Those ugly borders I have been loathing since the moment I got my P8 Lite (ALE-L04, now on 5.1). Got linked from an Android Central article today.
For icons still with white border, apart from the others already mentioned, I have: Google Photos, Play Games, Voice Search.
There seems to be a bug with the theme on my phone. The lockscreen wallpaper cannot be set independently from the homescreen wallpaper. From what I can tell, the theme has "styles" for Homescreen and the Lockscreen. Seems like the lockscreen portion may not be well defined enough and the system treats them as the same. The wallpaper settings allow me to change the lockscreen wallpaper with "Other", but once selected, it does not do anything.
Let me know if you need screenshots.
Keep up the good work!