So to add my observations to the anecdotes here - I went through today and topped up the engineering on a bunch of components in my fleet (via remote engineering, since they're mostly all in one shipyard at the moment). As I was trying to conserve G5 mats to get through a lot of modules (esp boosters and multicannons!) I limited each module to 2-3 G5 rolls. Normally that gets me anywhere from 40-75% of the way around the dial, but today 3 rolls was reliably getting the module above 75% of G5 complete. Many got there with only two rolls even.
So overall it feels like a mild buff? Taking my goal as getting each dial on each module above 75% completion at G5, I'd guess I probably made a third fewer rolls than would normally be needed. Nothing earth-shattering there, but as a little holiday bonus I'll take it.
2nd trigger - 4x fixed g5 focused medium burst lasers (for shields and some hull poking) and 2x g5 long range small rails for long range pp busting (single clicks for lasers, long click to add rails)
I saw this and just had to say, I got vastly better with landing rails once I added a fixed laser to the fire group. Like putting a laser sight on a gun. I don't remember who made that suggestion to me, but it's a great one.