Mike Miller, Dev. I want to have your children < Imagine the avatar with a sexy smile>! I love the new KDF content that much. < avatar winks>. I feel we owe you one for the good work.
Ok, how about some gourmet roasted coffee, whole bean fresh Kenyan?
1500x4 so 6000 for each facing is pretty small, 1-4 dual heavy shots would destroy that defence and maybe the time it takes to activate that power could of been spent concentrating on getting behind your attacker etc. Only having it a one time shield heal is good but the heal should be a bit bigger (maybe make the heal the same as what the borg (or similar) shield capacity would be on the ship you are using so that people who are using lower capacity shields are not at a disadvantage but I still am afraid that won't be enough (maybe do it once then again 5 seconds later).
An alternative would be to decrease the amount of time the regen happens to lower than 15 seconds say 5-10secs (since the amount of time BFI is up is one of the bigger issues with it imo) and maybe also lowering the amount of regen per second.
Edit: I just tested power siphon drones (in a Kar'Fi) against my level seven char on an alt account (I know theirs nothing in insulators but its more the general way the drones work thats important) and the drain is still far to much in power that is about 100 (close enough to 125) which will still make escorts (usally where weapon power is critical) almost useless against a Kar'Fi or any other KDF carrier for that matter. I think that only one hanger should be able to be slotted and its wings decreased to 1 with a maximum deployment of 2 wings in total ever.
Also maybe disabling its use on the Kar'Fi since the drones should not be used on a ship with such offensive potential (although Vo'Quv isn't terribly far behind it) and should only help with a science ship that can't deal much damage (when teamed thats fair enough for the support thats what science is meant to do).
Also the Kar'Fi Fer'Jai Frigates also should have their Aceton beam weapon decrease divided by 2 or 4 and the Daube should also have a tractor beam lockout cooldown about double (or several seconds more of double) of the changes mentioned at some point is this thread (15/16 seconds?).
Note: Numbers in this post are almost always rough estimates