[Slydria]

I don't think that's a good idea, it seems pretty intentional for the high weight and low weight benefits to be at odds here and I actually like how it is currently where it's a choice between raw power (20% SWA for heavy two-handing) or a mix of power, extra accuracy and crit (10% SWA for two-hand, +20 hit and +10 crit for lightweight two-handing).

Perhaps buffs are necessary to make Fitting Form seem more appealing instead: either making it more effective by returning it to 20 hit and 20 crit or adding a secondary bonus that grants an evade and magic armor bonus while wearing Armor under 5 Weight.