At this point, I see no incentive for RAH to sell any 175's to Delta. Brian Bedford answers to the share holders and Board of directors. He would not please his overseers if he sold 16 profit generating E175's prior to the completion of the contract they are operating under. There are still some years left on the Shuttle/Delta contract, and to give up guaranteed profit-generating revenue with the industry in its current state would be downright stupid, assuming Bedford wants to keep his job.
Another thing that does not fit well is that by cutting Shuttle America out of the DCI fleet, Mother Delta loses a lot of control over the contract of Compass pilots. Yes, the CRJ 900 can be competitor, and Delta can use those aircraft to still whipsaw the Compass pilots come section 6, but I would think Delta would want to keep a direct competitor around for effect.
I could see Delta wanting to cut 50 seat capacity via reductions at Chautauqua. RAH has already removed and sold or reassigned 15 E-135's that were flying for Delta under the Chautauqua name. Bedford is happy to let the smaller jets go, but he is very defensive of his E170 and larger aircraft. As was stated above, he held onto those ex-F9 170's despite a real bleak outlook on placing them anywhere else.
If Delta wants to cut Shuttle America out, it will either be at the end of the contract, or on terms that are very favorable to RAH. Just selling some 175's to Delta in exchange for Delta selling some Midwest seats is hardly justifiable. Not many of us like Bedford as a person, but we do recognize his business prowess. Rarely does labor benefit from his business plan, but even more rarely does Bedford execute any business deal that creates a loss for his company/ego.
Bedford has a forward thinking plan. It may blow up in his face, but he has not been running scared yet. ExpressJet and Independence/ACA were reactionary deals that followed publicly announced reductions or terminations of contract flying. A contract termination is never immediate, and a company like Delta has no incentive to tell RAH months in advance that they will lose flying...if anything, it would give Bedford too much time to build a solid legal defense to protect his flying.
If you watch what Bedford is doing, he appears to be buying up a comprehensive route structure in the Midwestern US. Assuming both the F9 and YX deals are completed, RAH will have independent hubs in Denver, kansas City, and Milwaukee. Add to that a strong presence in Indianapolis and Columbus (and to some degree St. Loius), and it seems that Bedford is gunning to enter the market at the dominant airline for Midwesterners to fly on. It is a smaller market, and is generally underserved (excluding Chicago) by the rest of the industry. For travelers looking for point to point or delay-free service within the Midwest, RAH will offer a compelling option. For any major carrier that wants to access that market share, a codesharing agreement would be mutually beneficial. This is why I think Bedford has gotten the blessing of his major parnters, and why his actions are not seen as being threatening. The only carriers gunning for MKE are Airtran and Southwest, two airlines that RAH does not have a relationship with. Everyone who deals with RAH is just sitting on the sidelines. By keeping the Shuttle America contract, Delta is quietly funding an (albeit minor) effort to take money away from Airtran and Southwest, two of the more established threats to the legacy carriers. The only bigger worries out there are Allegient and Spirit, but it will be another decade before those two make mainline pilots cry over their beers.
If RAH gets all 25 190's, there will still be RAH pilots on the streets. Don't forget, RAH has more pilots joining it's seniority list in the near future. Anywhere from 0-400+ Midwest pilots will be coming soon, and could easily staff all the Airways 190's. Even then, that would leave about 150 Midwest and 100 RAH pilots on furlough. Then, after what will certainly be a nasty, drawn out process, we may be adding F9 pilots to our list as well. RAH is far from growing to the point it will need to hire.
Bedford selling the 175 to Delta would be like Airways selling its A330's to Lufthansa. They may be connected via Star Alliance, but if there is money to be made off those planes, why would Airways give that up?