Is Vedette really worst tank out there? Worse than Scorpion, Galleon, or Striker? I can't agree. It's also faster than Goblin and Bulldog, and nearly just 2/3 of Bulldog's price. So line up tracked tanks, highlight those with cruise speed 5, compare their weapons, armour, and prices. Vedette might not be winner nor better than Myrmidon, but it sure competes with fusion powered Hunter.
Uses of Vedette: surely it can do something more thank kill peasants and drop helicopters. Let's consider little broader scope than beloved tactical level scenarios with 30 meters per hex. Could Vedette perform role of cruise tank? Cruise tank: british classification for fast tank that breaks through enemy frontline and attacks communications & logistical centers (doesn't attack frontline itself, that job belongs to PBI and slower & tougher infantry support tanks). Certainly some hovercrafts could be better at that, like Scimitar and Condor. Or...?
Or how about back up for 'Mechs of similar speed? Mercenary's Handbook has Wilson's Hussars recon lance with Locust, Stinger, Wasp, and Ostroc. What's the point of slow Ostroc in otherwise fast recon lance? How about this: light 'Mechs do the recon to find enemy. When enemy is found, Ostroc goes at it along with company's worth of employer's Vedettes, and game scenario starts from there. Maybe not as powerful as Rifleman and Goblin company, but certainly faster.
Mixing with other vehicles... Would make fair match with Hunter. Both have equal speeds and motive systems, Hunters fire at range, and Vedettes cover LRM minimum range. Myrmidon could be better, but it's not available in Succession Wars.