@munir
I assure you, nothing of value was lost — I had this MediaTek adapter in my old HP laptop, I had to rely on dkms to use a newer patched module not in the mainline kernel for it to work — and even with that it remained very flaky. I've replaced it with Intel one — 7260 I think. It came with Intel Bluetooth adapter, which also works way better than MediaTek one ever did, supports wireless AC and 5 GHz networks.