I think it's best to remember that a two stroke engine is nothing more than an air pump, all of the things that take place in a two stroke engine happen in one revolution of the crankshaft, or two strokes, hence the name. Not several cycles.
With air/fuel flowing through the engine at high speed, any disruption of the flow will be to the detriment of performance, with the exception of a properly designed expansion chamber, which is designed to provide back pressure/resonance to prevent un-burnt gases going out the exhaust port instead of being burned in the combustion chamber.
