I see a lot of downplaying the signicance of this. Maybe they are right and Nebraska will end up making the roster stronger. Addition through subtraction... BUT...
Let us also remember Kade Warner was a captain last season. With all the talk about culture, there isn't really a good spin on seeing a captain enter the transfer portal.
I see this as more of a transfer for playing time. It was looking like he was passed on the depth chart by younger players. I have no problem with him transferring for more playing time. Be it a captain or not, I don't think this looks bad at all.