Let's be honest.
The long-term symptoms are not caused by the lesions. A more realistic approach would be the measurement of axonal density + spinal atrophy. The spinal cord has the ability of rewiring, just like the brain. The ability is not enough, though. Space, time and oxygen are required.
Space -> Spare neurons/new synapses
Time -> Intense training for a looooooong time in order to train the new randomly generated synapses
Oxygen -> Energy production. Our neuronal mitochondria are really in a bad shape, though. Not to mention about normal-for-the-skeptics CCSVI.
To make the long story short: The symptoms in MS are mostly caused by wider atrophy and not focal problems, such as lesions. The latter slightly contribute to symptoms, if any at all.
Expecting healing turns you immediately into a carrot following donkey. It is hard, very hard. But it is the truth. Whatever has happened has just happened.