Just saw the tweet, and again I want to reiterate that giving massive bonuses to S-modded logistics hullmods is a straight-up buff because putting them on logistics ships is a no-brainer with no downside, especially since these ships are rarely replaced or lost. Story points are practically infinite so the player WILL get these hullmods built-in eventually, it's not a case of "if" but "when".
It's definitely a buff. I mean, it's a buff even if the bonuses were tiny
I think it might also make for some interesting decisions earlier, give you other options when you're far out from core and need more capacity after a successful salvage operation, etc. And I'm not sure that endgame fleets requiring less "stat stick" ships is a bad thing. (If, as was talked about in some other threads, there are mechanical changes that make logistics ships show up on the battlefield more often, that might change.) That said, going to keep an eye on it in playtesting and see how it feels; might tone it down some, might not!
On a different note, Solar Shielding kind of sucks for its main purpose because unless you put it on all of your ships you always risk that one ship without it getting hit and then rest of the fleet has to wait until it gets the CR back. So how about making built-in Solar Shielding double as a "lightining rod", i.e. ships with built-in Solar Shielding are MORE likely to get hit in storms? Then if you have, say, 3/5/whatever Solar Shielded ships in fleet the probability of hitting a ship without it goes down to 0.
Interesting idea! Seems like it runs the risk of trivializing storms for a fairly low investment, though, hmm.
... especially since these ships are rarely replaced or lost. ...
(Kind of unrelated, but seemed like a good opportunity to mention that you get bonus XP equivalent to what was spent on building hullmods in when you scuttle a ship or lose it in combat.)