If all the faucets are low, that would suggest a blockage upstream. Most likely the filter, but could be something stuck in the line. Either way, the faucet end is a symptom not the cause. Not unheard of for a regulator to get plugged either. The screens at all the faucets COULD be plugging up but, if that's the case, the whole house filter is most likely completely plugged up anyway.
2012 Chevy Tahoe LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition