I like the addition of the E-Jets. I find them to be superior in comfort to the CRJs.
So any addition is a good thing, if United can get more 175's by tossing the 190 bone to mainline pilots, then its a win-win-win.
Lots of carping around here regarding the 50/37 seaters, as far as I'm concerned, they should be used to support markets that can only support small jets , and not to pump up frequent service to larger/midsize markets, particularly from congested airports like EWR, LGA, and ORD.