I can't believe Bt died!! I am so sad. Hope he comes back in the next game... if there is gonna be one. Thank you Steve Fukuda!!! Titanfall and Titanfall 2 are my favourite games ever!! Thank you so much Steve Fukuda!!
Supposedly he is still alive. If you watch the cut scene after the credits, Coopers helmet starts to glow back up. In the one mission BT said he transferring some of his AI into Coopers helmet. So it's possible that BT is still "alive".