To each his own. I like the looks of the lower cover better myself, and I don't mind maintaining my saws. if I was a pro user coming in dead tired after a long day, maybe I'd get a little cozier with the big cover.
I've used both, and it really doesn't get in the way that I can see. I do get bugged about having to fork out $45 for a new air filter when it looks about like the one on a lawn mower that costs $6. The little clamshell filters that E-lux has used for a long time work well and retail out at $20-25...which I can kinda see, being as they are probably a low volume part.
If you have a 350-353 or Jonsered equivalent, there is a Husky "tune-up" pack containing an air filter, fuel filter, bottle of mix oil and a plug for $20 in some box stores.
I wish you could get the air filters at Napa or O'Reilly's.