In the picture above, there is leg armour over boots there. It's the thigh piece of master heavy plate over sovereign boots (leather). By removing the "Boots" type from leg armour it stops it replacing the boots, however they don't clip properly, unless you remove the lower leg part of the armour, often called Greeves.
You could make the default gloves as armour by adding this item to your CoreAccesories.xml (or to the relevant mod file)
<!--Item Name and Type-->
<GameItemType InternalName="LeatherGloves">
<Type>Forearms</Type>
<DisplayName>Leather Gloves</DisplayName>
<Subtype>Clothes</Subtype>
<!-- Human Male Body -->
<SupportedUnitModelType>KingdomMale</SupportedUnitModelType>
<SupportedUnitModelType>IroneerMale</SupportedUnitModelType>
<SupportedUnitModelType>MancerMale</SupportedUnitModelType>
<SupportedUnitModelType>AmarianMale</SupportedUnitModelType>
<SupportedUnitModelType>TarthanMale</SupportedUnitModelType>
<IconFile>Gloves2Light.png</IconFile>
<!--Item Equip Information-->
<CanBeEquipped>1</CanBeEquipped>
<RandomPeasantUnitLiklihood>5</RandomPeasantUnitLiklihood>
<RandomMerchantUnitLiklihood>5</RandomMerchantUnitLiklihood>
<RandomHeroUnitLiklihood>5</RandomHeroUnitLiklihood>
<!--Item Graphics-->
<GameItemTypeModel>
<ModelFile>Gfx\HKB\Clothes\K_Male_Gloves_Mesh_01.hkb</ModelFile>
<AttachmentType>Skinned</AttachmentType>
<Color_Clothing2>Color_Clothing1</Color_Clothing2>
<Texture_Clothing1>Gfx\HKB\Clothes\MaleLeatherGloves_Kingdom_Recolorable.png</Texture_Clothing1>
</GameItemTypeModel>
<!--Equipment Production Requirements -->
<ProductionRequirement>
<Type>Resource</Type>
<Attribute>Gold</Attribute>
<Value>1.0</Value>
</ProductionRequirement>
<ProductionRequirement>
<Type>Resource</Type>
<Attribute>Materials</Attribute>
<Value>1.0</Value>
</ProductionRequirement>
<!--Equipment Prerequisites-->
<Prereq>
<Type>Tech</Type>
<Attribute>Equipment_Kingdom</Attribute>
<Value>0</Value>
</Prereq>
<Prereq>
<Type>Tech</Type>
<Attribute>Equipment_Amarian</Attribute>
<Value>0</Value>
</Prereq>
<!--Equipment Modifiers-->
<GameModifier>
<ModType>Unit</ModType>
<Attribute>AdjustUnitStat</Attribute>
<StrVal>UnitStat_Defense</StrVal>
<Value>1.0</Value>
</GameModifier>
</GameItemType>
Or something like that, probably best to be careful before messing around with the game files though.