Variables in macros?

Is there any plan to incorporate the use of variables? I see a lot of posts saying you can't reference a roll within a macro i.e. vampiric touch healing half the dmg done. In theory dmg1=[[3d6]] sets the dmg1 variable to whatever the dice rolls result in, should you not be able to call in dmg2 something like dmg2=[[(dmg1)/2]] to get the appropriate calculation? Just curious because I know the API can do this stuff but standard variable calling being something you can't do just seems like an oversight to me. @{Manshune|wtype}&{template:atkdmg} {{mod=-}} {{rname=Vampiric Touch}} {{r1=[[0d20cs>20]]}} {{r2=[[0d20cs>20]]}} 0 {{range=Self}} {{damage=1}} {{dmg1flag=1}} {{dmg1=[[3d6]]}} {{dmg1type=Necrotic }} {{damage=1}} {{dmg2flag=1}} {{dmg2=[[3d6]]}} {{dmg2type=Healing }} {{crit1=[[3d6[CRIT]]]}} {{crit2=[[3d6[CRIT]]]}} 0 {{desc=}}   {{spelllevel=3}} {{innate=}} {{globalattack=@{Manshune|global_attack_mod}}} {{globaldamage=[[0]]}} {{globaldamagecrit=[[0]]}} {{globaldamagetype=@{Manshune|global_damage_mod_type}}} ammo= @{Manshune|charname_output}

Unfortunately that falls into the "can't re-use roll results" category. The API could certainly handle this, but not a macro by itself. You can reuse queries (?{}) within a macro and so you can define them as variables, but not inline expressions like you are hoping.