If you remove the 'deck weighting' allowed by the standard lore deck construction rules, I can't see why anyone would void a lore master. It would no longer come with the added benefit of a reduced percentage of drawing that lore master's cards.
That is the only potential problem I can make out myself. Although my personal preference is still to leave one or two openings in the council to get a stronger commander and a level 2 cleric or warrior. The ability to hold 3 lore cards and the level-dependent effects are worth it, IMO.