Just gonna reiterate what I posted in the patch note thread, that it would be great if the Damage and Acc/Rech IOs in Bombardment were replaced with Acc/Dam and Dam/End/Rech IOs to shore up the set’s feeble end discount properties. But even if that doesn’t happen, it still looks like a good set, and it’ll probably become the Blaster go-to, since they don’t really have to worry about endurance.
As for the other sets, more EndMod/Rech IOs is gonna be very convenient for frankenslotting Power Sink; no more having to settle for Acc/EndMod/Rech IOs. I’m concerned, however, that the End Mod sets for damaging powers are going to go underused. I’m at work and can’t really run the numbers, but it looks like if you fully slot either set, you’ll only get around 60% or so damage enhancement.
Edit: Here are the total enhancement values the sets currently give at 50 after ED:
Synapse's Shock
Accuracy: 42.4%
Damage: 68.9%
Recharge: 73.8%
End Cost: 21.2%
End Mod: 91.8%
Power Transfer
Accuracy: 39.7%
Damage: 89.9%
Recharge: 45%
End Cost: 39.7%
End Mod: 68.9%
Preemptive Optimization
Recharge: 96.3%
End Cost: 85.7%
End Mod: 97.1%
Range: 36.7%
Bombardment
Accuracy: 66.3%
Damage: 96.3%
Recharge: 89.9%
End Cost: 18.5%