Allwinner's A80 is 'in mainline' since 3.18... and still you can't do anything useful with this SoC and mainline kernel (since support is preliminary and most engines and not even SMP works) that's why you've to use there still 3.4.39.
The same reasons might apply here and most likely the use of this board as media center requires you to remain on 3.10 forever. @sinoivoip obviously doesn't do software otherwise these guys would've been able to show at least a boot log. They take what they get from MTK.