I think the current pump should be adequate but maybe there is a faucet that has debris or a restriction. I just replaced our galley sink faucet and the flow was severely restricted. Even though it was brand new the aerator either was plugged up when I got it or it plugged up very quickly. I cleaned it out and the flow was good.
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.