My only problem with the Dyson Sphere is the door. Apparently, Scotty & Geordi are smart enough to figure out how to trigger it without being dragged in by tractor beam, but aren't smart enough to realize that this is something they could have done more than once, & by doing so, could have salvaged the Jenolan, instead of risking their lives in a hairbrained stunt.
Scotty survived 3/4 of a century lost in deep space, cycling in a transporter, & Geordi was able to make a neutrino Geiger counter with a tricorder and his visor, while blind.
Two of Starfleet's greatest engineering minds reduced to using a starship as a doorstop. Now that's effing irony