I think Gonk Droids are overpriced.
A shield upgrade costs 3/4/6/8 depending in agility.
This has the benefit of not requiring an action to put the shield back on or costing a more valuable crew slot.
But if you have time to perform 4/6/8 Gonk actions you could recover 2/3/4 sheild over a game...
No one seems to be using Gonk, two actions for a single shield, might as well just focus for two turns and save ten points, buy a sheild upgrade and you get most of the upside at a lower cost.
So, what would a reasonable cost be.
6 points?
If it cost 4, I'd certainly start trying to make it work, but even at 6 points I think it wouldn't be a problem/auto include.