Here are some facts that i know of....
The two additional F50's are to replace the two recently bought F50's. FNE and FNF are heaps of junk. No hot galley and can not be installed. These two are that bad that several towns, GEL, ABA and ESP, have requested XR not fly those aircraft to their ports. They are even stupid enough to sent one of these to the Granites, at 4.5hour flight. Long time to go without a hot meal.
Additional F-100's, yeah right. They cant even keep 3 of the in the air. The XR board some time ago decided NOT to have a stock pile of spares. So they sold them all. Big mistake. They are more than happy to have an aircraft AOG in KNX or some other place for 3 days, than to have spares.
And CASA told XR that their hangar was not big enough to justify 7 F50's on a RPT AOC. So one of them is charter only. Not that XR take much notice of CASA.
So...XR expanding? Maybe not. They cant even operate an airline with the equipment they have got.