Stick with "EEVblog", that's your brand. Something like "EEVblog Shorts" (or "Rants" or "Wun Take Videos") that builds on it would be my suggestion for a name.
And don't tie yourself to Youtube or how they currently implement things (like having "channels") - that can all change in an instant and you should be free to move to some other service or your own hosting if you need to.
Voted to keep it all on one channel, but I don't really care as long as I can find it all from eevblog.com.