No mudguards., Ortlieb are going to keep the stuff in the bags clean and dry.

there are other welded seam bags too, other construction type,
Sewing.. sewing is holes, so will leak, ,
then you have to poly bag the contents, as it will get damp in there..

Or have a rain cover to go on the outside ..

Short chainstays mean you may hit the bags with your heels ,
one solution, put a rack on the front wheel and bags go there ..