First, check to see how much flow is coming out of the outside faucets. You should be able to run both of them very well.
75 PSI is very good pressure, and a mid 70's home often used 1" block poly pipe with insert fittings and hoseclamps on the water line.
If the outside faucets run well, check the aerators on the faucet and clean them. Shower heads may have also gotten clogged.
The tub should run very well. Normally outside faucets and tubs work well since they don't have screens.
I would hate to think that rocks got in the line and started clogging pipes inside where the fittings reduced.
Sad to hear about your job. Those job layoffs will be affecting the rest of us too.