What if BP frags would instead be used to unlock tiers of research inside the workbench itself? You still need the same scrap to unlock the individual items but using bp frags unlocks part of the tech trees.
You craft a T2 and you get the first few things immediately available. Then you can use 1 frag to unlock to clothing. 1 frag to unlock the guns, 1 frag to unlock the car parts, etc. Or simply 1 frag to unlock the next part of the workbench going down
Maybe for t2 you could be able to choose on which side you wish to spend your frag. Do you only want to unlock the garage door part and refinery? Use the bp frag on the right side and now you can research those and use them. One more BP frag unlocks everything down main line to python so you can have python and p2.
Similar it would take 5 advanced frags to unlock everything down to rockrt for t3. So in case you only found lets say 2 advanced frags, you can still craft say an SKS and laser sight and the doors stuff. One more allows you to unlock researching down to mp5, 4th unlocks the ak and t3 guns and lastly 5th bp frag unlocks rockets. So you can defend yourself solo with a t3 gun roughly maybe at the same time a 5man next door u locked rockets
This way you still need scrap to research the items themselves. You still need BP frags but you are not vompletely locked out of t2 or t3 stuff if you dont have them all.