Crimson Longinus
Legend
Depends.
Many forms of technology can only be operated by specially trained individuals. If the loremaster is needed for their ability to safely operate new tech or reliably recall info, that explains why they are pare of the party.
Give some concrete examples. Black powder weapon proficiency is only a feat choice and so is expertise in any lore skill. I have super hard time seeing how one could compose a full class from such elements, a subclass I could perhaps see.