It's doable and will be just fine IF everything runs on time. With that said, have them change it if you don't like it. Just explain you got a schedule change notice, and your connection isnow very tight, and you're not comfortable with it.

Best bet is to pick another flight/route BDL-EWR/IAH/CLE-LAS that better suits you, and suggest it to the agent.

Note, the changed segments will NOT post as online booked. You will need to call after the fact when your miles post to have your EQM adjusted. So long as one of your segments remains unchanged, your online booking bonus will post off that itinerary.

btw, with CO's asinine policy of closing the door up to 10 minutes early, even at hub cities, 10:45 - 11:15 makes a 20-minute connection in my opinion.