I dont suppose MOL would be so bothered about HUY to be honest, not if theyve had to pull out due to crap loads.
In theory an 80-100 seat daily rotation would work, looking at the FR stats, but as has been mentioned that figure is at FR's rock bottom fares, cheaper than most other potential operators.
Regarding the less common routes, i wouldnt be surprised if thats what HUY would be after if they are trying to attract Jet2, so not to compete with their charter operations. It says on their masterplan that they believe potential routes from HUY for a lo-co would be, among others, Frankfurt and Paris but i suspect they may try for places like Barcelona and Nice so to compliment the existing route 'network'.
Im starting to think that none of this will ever happen though, maybe at best we will see something from EZE like LCY or BRU at a push in the next few years.