Hull Restoration feels like cheating. Pick this skill, and your ships will magically fix their severe, overhaul-requiring problems mid-flight.
Wait until you learn that you can magically fix their severe, overhaul-requiring problems as soon as you buy them, with a press of a single button. All you need is to be docked!
Hull Restoration saves money. Money is not a limiting factor in the game. As a result Hull Restoration is completely meaningless in its D-mod removing role - which takes forever anyway - and functionally only serves as a +15% CR bonus. Now +15% CR bonus is obviously very good, but when you put it on a capstone skill at the end of the most useless skill tree in the game it's just not worth it. It's not 4 skillpoints level good, especially since you can just get it elsewhere. Even if you do actually want to get Ordnance Expertise AND Polarized Armor(which is a very niche scenario) you still pay 2 skillpoints for it.
You can't even defend Hull Restoration "in early game" because it's a capstone skill, so you need to be at least level 5 to get it, and ideally you want to also grab some other QoL skills early like Sensors or Navigation, or how about Crew Training that benefits your entire fleet whether they have D-mods or not? By the time you actually get to Hull Restoration in most cases it's not early game anymore.
Also: I am getting a very strong sense of deja vu from this thread. I swear I've read something very similar(and just as aggressively wrong) before.