Airside investment wouldn't make any difference to KLM. The runway and stands can easily cope with E175/190 flying a very short route and there is enough for one to overnight as well if they wanted to. It must be quite concerning for the airport having just released an ambitious expansion plan to potentially not even be able to sustain KLM's hub link. I also would presume they are currently the second largest carrier passenger wise, meaning if these rumours are true the dependence on Flybe will have increased even further...