A couple of worthwhile documents to review which would then result in more informed opinions on this topic.
Cheers.
ALPA Merger and Fragmentation Policy (2009)
http://www3.alpa.org/LinkClick.aspx?...%3D&tabid=3345
United/Continental ISL Award (2013)
http://ual.alpa.org/LinkClick.aspx?f...t=aW2PEPbXqsk=