Stacking loop feels unrewarding right now, because the second you beat TLD your investment in it will become pretty much pointless. It also hurts Machine Hunter really hard, since he relies a lot on dodge to compensate for his poor mobility. Dodge stacking is a good idea for him... until it isn't.
Additionally, it also hurts Blade Reflect Commandos, making that specialization pretty much suicidal as soon as you get in loop.
I believe that a stacking debuff would allow for Dodge to continue to be useful during loop, while preventing it from being pretty much invulnerability. The player can continue to hunt for dodge upgrades to keep their survivability up, and if those don't show up, the fact it isn't an instant -50% dodge would at least let them search for a new avenue of survivability without being immediately kneecapped.