I found the crafting system a little more elaborate than that.
A lot of attachments do different things - including faster reload, longer range, better rate of fire, increased critical damage and so forth. You have to pick a combination - and you can't just have a single "more powerful" version, though obviously attachments are there to enhance the weapon.
I found it quite in-depth personally, and spent a lot of time tinkering with it - trying to come up with the ideal weapons for my playstyle.
Personally, I found the loot very compelling - especially once you get to the legendary modifiers and what not. Not perfect by any means - but certainly leaps and bounds beyond any other Fallout game imo.
Same goes for armor modding - though I never really delved into that as much, since I didn't feel like I needed it. My playstyle is very much about stealth and long range - which means I shouldn't really get hit much
I also greatly appreciated Survival mode - where the game is significantly less spongey - and yet also a lot more dangerous and tense.
It's not a carefully crafted linear experience, sure, but for an open world game with hundreds of hours of distinct content to explore - I found even the vanilla game suprisingly well balanced for a Bethsoft title.
But I guess it's all about what you want from this type of game. I'm all about exploration, immersion and progression - and all of those are superb in FO4. In my opinion, of course.
My main issues involve the setting and the writing. I'm not a big post-apoc fan and I found the writing subpar for the most part.
Thankfully, I expected that going in - which was a big help.
Starfield is most likely going to be more of the same, though there's a higher probability of me enjoying the setting - as it's supposed to be inspired by Star Wars and such - which is among my favorite settings.
But the writing? I mean it's possible they've upped their game here, but I really doubt it.
I guess they're sort of the opposite of CDPR in terms of open world game design. I'm glad we have both kinds - though it would be pretty neat to see a combination of all the goodies.