It's the ex-SR overhead costs wich are making the regional routes unprofitable. Imagine that Crossair had 2800 employees for 80 aircraft and Swiss has 11500 employees for 131 aircraft.
I know that part of the now skipped routes had a bad SLF but some of them are always very full (eg. Salzburg or Jersey).
The above comments from PECS and pointseveneight are factual and corrects. The Studi-dude again shows his ignorant and foolish-naive attitude. Clearly a guy with some knowledge but who misses the picture completely.