Woolley,
Despite my alleged poor education I can speak with some authority regarding the rosters referred to in this thread.
Sometimes they operate, let's say, 4 sector duties, other times they operate 2 sectors with a short SBY before of after, continuous would be inapt, regularly would be appropriate.
You state this to be 'poor planning'! If it were planned that they would be called out off that SBY then why the ****would they be planned on SBY in the first place, why not roster them for the supposed planned flight?
They operate a fleet of geriatric turbo-props, lack of spares, crap weather etc. etc. etc. and as they say '**** Happens' or to novices 'Welcome to Aviation'.
The fact they might not be available for the next day's duty is the operator's problem, not the pilot's, something borne into consideration in advance.
You indicated that you consider you annual workload to be 900 block hours, what about the 1900 duty hours or would working a normal life bring on your ill health again?
I guess EZY don't roster SBY's!