I am considering replacing all of my Howitzer specials to DU Shells (from Compound Panels).
My reasoning is that after observing many base attacks (including on my own base). The compound panels are all but useless, as MCX fleets (and anything else which out-ranges them which is almost anything) just pound them into submission from safely out of range anyway....SO, might as well use the DU Shells to increase their damage, and then at least they might inflict more damage on blitz fleets.
What do you think? Is it worth your turrets doing more damage if they have less armor? I think so, because armor means nothing these days when long-range prep fleets (or MCX base fleets) easily take out your turrets from a distance, no matter what their armor level.