Piking isn't fun. It essentially turns the raid into a chore. Give pikers something to do! I'm fine with raids becoming harder because that can be balanced out by increasing loot chances.
Suggestions:
Abbot:
Ice - remove DI and waterwalk hacks. Make people do it the old fashion way (*but teleport all the dead people in the water to the top at the end!). Rocks - Increase duration, increase amount and speed of asteroids. Make rock conservation an issue.
Titan:
Twilight Forge is ridiculously long and not hard at all. People put off joining to do something else while others clear the way, and then try to join at the last minute. It's silly. Make this quest a one-time flag.
Titan Awakes: make multiple people required to run power, have multiple crystals required to "charge up" the laser. Allow possible completion even if all pillars fall and the Titan still has shield. (Maybe at that point, spawn tons of difficult mob and give the titan 95% DR instead of 100%.)
Reavers:
Make it epic please!