The capital form is a bit akward with the contrast of terminals. Open capital Ps normally "read" closed, but because of the bar, I get this zigzag of white space that I think is what bothered me at the first look. You probably need to let go of either the open bowl or the serif on the bar. I agree with the choice not to cross it completely.

Be aware that the lowercase form already exists as a scribal abbreviation. I probably remember incorrectly, but I think it often stood for "per" or "pre" or something.

«El futuro es una línea tan fina que apenas nos damos cuenta de pintarla nosotros mismos». (La Luz Oscura, por Javier Guerrero)