my 2p's worth,
i love slinging paint, got through 5 cases at mayhem this weekend, BUT i haveplayed and do enjoy magfed, as for the ergonomics of magfed markers i feel form should beat function.
best way to look at it is that magfed has 2 sub genres, tactical and milsim
tactical includes all types of magfed weather it be stick feed, magfed, mayabe even q-loader(heavy gunner role) and is more about generally having fun playing a different style of paintball
milsim on the other hand is the same as tactical but only allows built for purpose magfed markers, though would come down to site/event rules for alloing stick feed(like custom markers on sprung stick feeds) as so far ive seen two different L96 look alikes and a custom mauser look alike.
hope that brief explanation show some clarity