The blue alternates just need to go entirely. I've grown to hate them. Thanks Big Z!
Speaking of Big Z, he's going to model my choice as the Cubs full-time alternate. I just thought these looked sharp. Perhaps you could make a minor tweak and go with an all navy cap to make the look more modern and change the socks to add more navy in as well.
Prolly get blasted for this, but I wouldn't mind seeing a black alt basically like the blue jersey's except black with a black hat. It would pretty much look like the Mets or even the Giants but I think the blue, red, white, and black would look sharp.
The 1912 Unis are pretty sweet but red wouldnt go well with them. It would be interesting to see what the home unis look like that incorporate that same theme. Pin stripes wouldn't work. Too much like the Yankees.