I don't think the ACA is a bad bill, but it misses many opportunities for better healthcare reform. The biggest for the Tech community in my opinion is that it keeps up the relationship between health insurance and employers.
In the Tech industry we need the ability to change employers fast and to start up new companies inexpensively. It makes it harder to start a new tech statup if I have to offer employees healthcare. As an employee I'm less likely to work for a new start-up as I fear it failing and losing my health insurance. Also, in technology we have a lot of people working for themselves, these people have always had trouble getting insurance.
We need to eliminate the relationship between employment and health insurance. It should be illegal for employers to give you health insurance. Everyone should buy on the open market, there should be no more "groups". In short we should buy health insurance like we buy car insurance.