Well, "too difficult" is relative. I mean some people can manage it for their purposes, so one could say it's gated by a combination of skill, personal strategy, build type, and not something everyone or every build has easy access to. It's right where it needs to be at the moment.
Importantly, remember that Authchips aren't even required for Fabrication, either--many people will simply fab anyway and recall the squad, or of course there's rolling Authchips from one fab to the next, overall putting hard caps on the possibilities while still allowing access to a few extra parts for those capable of doing these things. OR of course simply building what you want and dealing with the squad, or leaving before they get there
Authchips should simply be considered a "free" way to get something without the other consequences, just the need for inventory and acquisition/carrying it/them around. So whether or not that trade off is worth it is up to you.
Again, you need to lean a bit more into it if it's really something you want to do ("free" fabs), but we can see in the aggregate player stats that it is in a good place. There are varying degrees of Authchip use across winning runs--some make heavy use of Authchips, some use none at all despite building dozens of things across a run, and yet others fall somewhere in between. There are still some folks building their entire build for the end game, but it's not nearly as prevalent as it used to be.
(The other option: Explorer mode could be the feel-good setting you're looking for without the same balance restrictions--even without an Authchip there is no automatic trace and investigation so you can get more provided you have sufficient hackware.)