If a 49 seater is not viable with lower prices does it make sense to operate from an additional point, say Leeds - EMA then FRA perhaps twice daily with a bigger aircraft (A319). Leeds has wanted a FRA service for long enough and anyone flying to FRA from LBA has to go via somewhere, AMS or BRU or travel outwith the area to MAN for instance. So a stop via EMA would hardly be a hardship. Jet2 use a 737 to Dusseldorf without the benefit of onward connections with LH so you would think a link to FRA would work.