After discussing it here and looking at the numbers, i think shield modules need to have their hitpoints (hull hitpoints, no shield ones) reduced.
Take the fast recharge shield and the multiphasic shield.
Fast recharge: 110 hitpoints, 262 shield strength. Combine 372 points.
Multiphasic: 115 hitpoints, 275 shield strength. Combined 390 points.
For tribe, 220 hitpoints, 131 combined 351;21 point difference.
230, 137.5, combined 367.5. 22 point difference
Of course, tribe dont get the full advantage of the shield resistance and recharge, but this does seem a little too close, seeing as how they get boosts from other modules as well.
Lower hitpoints would mean less of an advantage (Possible giving other races a much needed boost) and also increase the value of shield disrupters, a rarely seem weapon, as you are more likly to disable a low hitpoint shield when its down it the same time frame.