1) Actually, it is a worse start. Even though it does have free retreat, that is still automatically 1 easy gotten Durant lost, as you probably wont get both Sneasel and Durant in your starting hand.
2) If Durant cannot attack, it cannot retreat into Sneasel or Weavile
3) The only pokemon non-Durant and with a retreat cost is Rotom, and that is a very unlikely start, and even more unlikely to also get a Sneasel in that hand.
Glaceon, Weavile just cannot and does not add consistency. Is it a good tech? Probably. Does it add consistency? No
2) If Durant cannot attack, it cannot retreat into Sneasel or Weavile
3) The only pokemon non-Durant and with a retreat cost is Rotom, and that is a very unlikely start, and even more unlikely to also get a Sneasel in that hand.
Glaceon, Weavile just cannot and does not add consistency. Is it a good tech? Probably. Does it add consistency? No