It's been stressful at times, but I must say that since I removed Scarlet Spider I never missed Ben Reilley any later than turn 4. I was in a position in a few games where I had to replace Friendly Neighborhood Spider-Man with Peter Parker but in general it's not an issue. First, a turn 1 or 2 Longshot really helps. Secondly, if you hit one of your two or three Xavier's Schools that is just an added bonus. Plus, like I said before your calls should be Scarlet Spider / Spider-Man, which reduces the likelihood of missing him. Lastly, Twist of Fate is a very good card for this setup because it's basically Longshot, but you get to keep the character of your choice. I'm not saying it'll never happen, but not to the degree that you should worry about not having Costume Change. I just always found Costume Change to be a dead card for me. I never used once I had Longshot in play because I recorded my calls and there's no point in doing that if you're going to be forced into shuffling your deck anyways.

updated the deck again...im deciding wether to play Spider Senses or Plesant Distractions as I would prefer to have 4 of one of the other to increase my chances of hitting anything w/ Longshot.

Just be sure to think about the current metagame. Couple key things that can really hurt you:
Squadron: Archer kills you if you live past five, Fun and Games will help.
Doom / Injustice Gang: Punishes you for a large hand. Fun and Games and Spider Tracer will help
Anti-Matter: If you survive the early game, Fun and Games to negate Fiero and Chomin.