1) Admiral Motti - While there are better Imperial commanders, I still feel Motti is the default commander for Imperial fleets. This is because he benefits every Imperial fleet regardless of its composition. At least you still have to crit with Dodonna's effect to occur. Rieekan is also in this same boat, but we've already beat that horse to death.
2) Cluster Bombs - Much too high a cost for the minimal effect. I think an exhaust makes it too strong though. It would be better if it was an exhaust but did not refresh after the status phase so you could only use it twice in a match.
Engine Techs - I always want to choose this upgrade, but always back away when I remember that it requires a nav token. I know people still use it, but I think it would get more play (certainly by me) if it only required exhausting the card.
3) Still not my strong suit. Comms Intercept Team - Support Team slot, 5 points. Upon activation, exhaust this card and choose a number of ships distance 1-3 up to your command value. You can look at their top command dial. Basically would "overhear" their opponent's transmissions to give them a general idea of their immediate strategy. Could be useful with Raid to shut down opponent plans.
4) I really like @Vipcard3 's idea for Yavaris to be an exhaust, even though I think it still should be for the squadron value (or one more with token). It makes it more like Avenger where it could be countered with MS-1s. I've always like Yavaris, but always used it in conjunction with FCT instead of Relay (pre-FAQ). Just really worried that they will keep nerfing it until it becomes useless, in which we will rarely see Neb-Bs on the table.