Fend buffs are great,
but Spears have no decent midgame runewords. There is nothing between Honor and high runewords. Access to things like Obedience and Insight would greatly alleviate these issues. Things like Crescent Moon and Infinity make perfect sense for a Lightning Strike Spearzon. It’s a little silly the act 2 merc that uses the amazon skill, has more item options than the weapon specific class.
To a similar extent Claws only really have Pattern and Chaos. Giving Claws access to things like Crescent Moon, Lawbringer, and Plague would also greatly assist them due to their lack of options.
I don’t see how this would alter balance, so much as give these weapon specific classes access to the tools everyone else is using.
Some of the Scepter/Hammer/Mace/Club confusion with Runewords also falls into this category, but I could see how this could potentially create strong options for Paladin.