I doubt it. The plan is to sell it back to the private sector. What the Government are doing is not only investing in the Airport, but investing in Wales and inbound tourism and business, albeit at a small scale at the moment, but you can't expect huge changes to happen quickly.
When/If CWL does get sold back to the private sector, then surely the loans would still need repaying in a timely manner?
In the state that CWL was in no-one was willing to invest. Things have massively improved in terms of terminal appearance and routes/airlines are improving as well.