The gators are used to help with streamlining rather than a quick "fix" for poor technique. The gators come into play mainly for cave divers doing serious penetrations with scooters. At this level the divers try to get every piece of equipment (including dry suit legs) as stream lined as possible to minimize drag.
For "normal" diving purposes using the minimum of gas in the suite coupled with good trim and buoyancy awareness is a better practice than adding additional (unnecessary) pieces of equipment.