.Fundamentally, I seem to be finding that I just collect up all the other mat's that I need as I'm looking for G5 mat's.
Congratulations! You just found out what many of us, me included, were telling you since the beta: when you collect G5 materials, the materials for the lower grades generally come in all by themselves. (There are a few gaps here and there, which the material trader bridges for me, but generally i get G1 to G4 "for free" while collecting for a few G5 rolls. )
.
So all the "but the additional grind" postings, at least in my eyes and according to my experience, have no substance at all, and seem to be written by people who haven't touched the new system yet. (The alternate explanation is that all those people built up stockpiles of G5 materials in the old system, where they vented all G1 to G4 materials to have more storage space for G5 materials. Now they use up the G5 materials and lack the cheaper materials. )
.
So in contrast what some people here scream all of the time, there's actually little to no additional effort for G1 to G4 when actually using the new system, you only experience new grind when still sitting on a stack of old materials and are still mentally locked into the old system.
.