If you look back to last Ep. when Lockon fired on Ali in Zwei with the GN Arms cannon, it doesn't look like Zwei was actually completely destroyed... it looks like only the bottom half of the suit was vaporized, thus leaving the cockpit intact... and let's not forget the Gundam death golden rule... no blood in the helmet, no vaporizing in the cockpit shot... not dead... which means, we'll be seeing Ali again.

as for the rest... whittling CB down to skeletal crew of seven (i think) would be a pretty interesting move to head into season 2... but would make sense for incorporating characters like Saji (mentioned above), Graham (i hope), Billy, etc...