Shortest landing distance at Blackpool 1869 metres, shortest landing distance Coventry 1615 metres. Until CVT can persuade the planners at Warwick District Council to allow them to use the tarmac that is already laid (2008 metres), then CVT has a problem with B738s.
In any case, there is no chance of Ryanair coming to CVT. Why would they with bases at BHX and EMA?