Personally I am all for allocated seating as it would make the whole process quicker, less stressful and in my opinion that little bit extra value for money.
From my opinion the current boarding process only seems to work at some airports, I only fly from Liverpool in the UK and it is very organised there.
However in spanish airports for example there is no queueing system so some passengers force their way to the front to try to get good seats and there is virtually no control of who is and who isnt speedy boarding. You can tell people are anxious to get good seats! So much so that as soon as they see a gate agent walking over everyone jumps up from their seats and runs to get into a queue, its the same around FIDS - a little crowd gathers and as soon as the gate is announce people are literally running and pushing. Im sure most people will consider this a vast improvement.