The national healthcare exchange is scheduled to kick in this Wednesday. The GOP predicts confusion, higher taxpayer costs, and little relief, and there’s already a lot of the first going around when it comes to cost and coverage. Essentially, no one can be denied for a pre-existing condition; people who already have coverage can still buy in if they want; there are several combinations of higher-premiums versus lower-payments, and vice versa; and there’s a national hotline and Web site. Still, many expect a lot of hiccups, and even more questions, during the rollout. The biggest question of all might not be answered for months, even years — is it worth it?