Weak AC? Changed Blower Motor & Controller but still weak

The blower would affect air flow. The cubic feet per minute would be the same for outside air for either heating or cooling. It would be slightly different for recirculate because the air path is different. But the blower has nothing at all to do with the vent temperature. If the AC isn't cold that is a separate issue. It is of course possible that both the blower and the AC are not working properly. For an AC which isn't cold most likely there is a leak somewhere and the system is low on refrigerant. As I understand it you do not want to run it like that for very long or it burns out the compressor, and that is a very expensive part. Also dogma is that the Prius AC is very picky about what goes into it, use the wrong oil and again, there goes the compressor. So be careful where you take it for repair. The dealer should have all the right tools and expertise but it isn't clear that every AC repair shop will.

 

From your descriptions, I don't think its a blower problem. Have you tried looking at the compressor? Might be problematic. Take a look also at the cabin filter. If its blocked, that's another problem. A system also low on gas can do same problem. Try having the car scanned for trouble codes.