PAX allocation system has changed. PAX are now a lot more touchy about RI/CI and price, and it takes considerably longer to get all PAX´s attention.You could either hang in there and wait for recovery or boost RI/CI by marketing or lower your fares.(You can also try to raise them on accepted routes,that will work now,too.It´s a bit more try and error now.)
New system also includes things like using an appropiate aircraft (especially for longer routes) or more strictly enforced oversupply rules, but that won´t touch you now.
I suggest you´re visiting the game rules department and recent forum discussions for update.