I see what you did there. If what you say is true, how come you never see Gremlins close to the top in tourneys?
I keep noticing the word "finesse" used as an all include whenever a crew doesn't win effectively. In reality Masters can have finesse AND still be a strong force. Examples of these are Pandora, Collette, Dreamer and Viks. These are truly finesse masters that have been at the top consistently.
I have won with Gremlins, but I had to do things that took more luck than skill to get them to work. Or to do combos that have been errata'd since. The really strong spells require you to sacrifice a lot of wounds, a high card and/or stones and be dangerously close to the enemy.
As you already know his summoning requires an 11 and on top of that you need a specific model for it to work. You have a shorter hand so you really rely on luck to pull those high cards.
I would continue, but I figure that I have ranted enough and this is not a Somer power level Discussion per se.