Exidor,
Nice post with lots of good comments. I agree that gravity is not the mass lockdown of other power sets but does ok. I have never felt that I could not control the group and do just fine with sloting, pets and enhancements making up for my power choices.
With that in mind, Propel is ok in its new form. Properly sloted it does decent damage, same as my epic power pool blast. My only complaint about it is the slow animation time. If the devs could fix that I would be very happy with it. I never notice the end cost but I am a grav/emp with stamina, RA and conserve power. I am probably an exception here. In PvP this is one of the nicest powers since controllers have so few actual damage attacks. The 3X damage has been allowing me to hit for over 500 in the arena. I cant ask for more than that. As a future improvement I would love if the objects changed to reflect time of year (maybe a old tree in winter), environment (how about a computer terminal in the lab settings, a I-Beam in a warehouse, etc) and overall fun (what about a boat instead of a car).
I will miss the single target Wormhole as well but I dont mind the AoE version IF they increase the disorient. Right now its duration is almost negligible and I feel like it take me longer to set up than it disorients the mobs. Double or triple it and I will still keep it around.
Dimension shift is a worthless power and we are stuck with it. Every power set has its stinker and this is ours. It sounds good on paper but its just not worth it. I think the devs will continue to tinker with it but its a load stone our Spec is stuck with.