Recently Ryannair announced a profit downgrade and as a result their share price fell something like 32%.
Thats how fine a line things are on low cost carriers.
With respect to no window shutters then thats just a real pain-in-the-arse thing, especially when you have the sun in your face (even in Europe) and I believe the paying pax deserve better.
Nothing worse.
With the reclining seats, even recline them an inch and you get a thump from the person behind, especially when you hit their legs or whatever else.
On very short sectors thats the price you pay, but I think cost savings can possibly be done in other non-intrusive areas that dont compromise some basic comforts.