3.5e is best played as core BOOKS (not SRD) only, no errata, no houserules (even the deity options), with the DM using the DMG tables for determining things like settlement item availability and to generate loot, random encounters, NPCs in settlements, and so on. ALL non-optional rules made use of as well, on top of the advice right at the start of the DMG that makes taking a "15 minute adventuring day" result enemies fortifying or packing up and abandoning their lair.

Playing this way should see most "balance issues" with 3.5e evaporate.