Super Hornets would be a waste.  They're not much better than the Hornets they replaced.  I don't know what Boeing was thinking but get this: The Super Hornet is 101km/h faster than the CF-18.  Like, really?  What was the point of this?  If you're going to make a Super Hornet, make it a SUPER HORNET, not another sub Mach-2 bomb truck that's incapable of supercruise!  I'd rather buy Gripen-C's as stopgaps.  They have weaker A2G performance because they only have the payload of a CF-18 but they're faster, more agile and therefore better in A2A than the Super Hornet.  The Super Hornet is a big, heavy fighter-bomber designed specifically for anti-ship operations (it is after all only used by the USN, not the USAF) and its A2A abilities are limited as a result, especially BVR.