This is not accurate. I've only been with C5 for a year and I'm a solid line holder. I am 50% up the F/O seniority list with upgrade still holding steady at 2 years, maybe slightly longer. CLE is not closing, it is downsizing. C5's operations are status quo right now. Read below. From management:

"Efforts continued this week to identify the impact to our operations once United concludes the "de-hubbing" of CLE early this summer. At present we believe it will take another week or two until we get the schedules beyond June from United. I can report we've had some very productive meetings with United this week and they understand our desire to communicate the longer term scheduling plans as soon as practical. There will not be a reduction in the amount of flying we perform for United - that is to say all of the planes we fly today will be fully utilized at other United hubs once the downsizing of CLE flying is complete."

All in all C5 isn't a bad place to work. The pay sucks but the people are great.