No meatamagcis other than quicken apply to reconstruct.
Thus reconstruct has always yeilded a lower base amount of healing. infact a fully repair specced forge casting reconstruct on another forge would do less 'healing' than a radiant servant casting heal - even if the warforge had only 'healers freind 1' and no heal amp slotted at all.
Additionaly heal cures all sorts of nasty status effects, recon only gives a speed boost - which is minor and importantly doesnt stack with haste.
The way to balance them out would be to allow empower to effect reconstruct, drop the speed boost thing and apply heals status removal effects. at the minute they are not balanced.