As reported before Oppo is working really hard to improve the software experience of their users. In fact the company will soon ditch their existing Color OS ROM and replace it with AOSP ROMs which provide a clean Android experience.
Nevertheless the company has now released a stable version of the ColorOS v2.1.5i ROM for its existing flagship devices - Find 7 and Find 7a. The update ROM is around 1.01GB in size and is only available via direct download from the Oppo forum. The OTA update will however be released later today. The Color OS ROM is apparently based on Android Lollipop 5.1.1.
The Color OS update comes with a new Smart Lock Screen which can be enabled in Settings > Safety & Privacy. Besides that it comes with the ability of disable Google apps when editing home screen and several fixes including patches for the latest Stagefright Exploit.
Oppo however has stated that this will be the last ColorOS update for the Find 7/7a. The AOSP ROMs for these devices are in a public beta stage and is expected to be released by the end of this month.