Lots of people have bough Android devices with MediaTek chips inside.
For many of those people, trying to keep their devices updated to the latest version of Android has been an exercise in futility.
The main issue with your platform seems to be it's closed nature.
Because of that, it's extremely difficult for the Android developer community to provide any support for devices that rely on MediaTek chips.
Please, openly provide all necessary binaries and source, so there can be proper Android developer community support for MediaTek based devices.
Basically, full support for AOSP + Custom ROMs.
You could aim to be the "Asian Nexus" and reap all the benefits of the Android developer community enthusiasts.
For more information:
Thanks in advance.