Their schedule is still very "fluid"... they keep changing frequencies and serving patterns on the routes they are currently serving, e.g. the FMO-VIE and FKB-VIE flights have now become FMO-FKB-VIE, before switching back to direct services in a while, but then at reduced frequency.
OL is busy acquiring charter contracts for the summer period, and I guess they hope for more of those whilst also needing more time to understand the traffic levels on planned sceduled routes before finalising the summer schedule.