It’s a shame that you can’t opt out of base building. Like you could make a mechanic for it that still incorporated the robust scrap mechanic in fallout 4. Example: you gather the stuff and appoint a settler as architect. After a set number of days you get it upgraded with some barebones resources and defenses and moderately upgraded weapons for the settlers (maybe have weapon type determined by faction like Brotherhood gives laser pistols or whatever.)

Of course you could still go back and personalize it, make additions, etc, but it would enable you to move on if you want. Lots of people do end up with a “home base” they might want to customize but customizing every settlement? Not really my ideal use of time. On the other hand some people love it. Make it optional and everyone is happy.