I do agree, funny, that I had that same problem with my BMW, front was bulging when brake applied, fitted new stainless hose, rear developed a leak, then split, bugger of a job to change, as BMW use allen bolts made from cheese for the banjo nut, hence just rounds off as soon as touched. My Method Cutting wheel in a dremmel, cut the heads off, then used long nose pliers to take the other bit out.
I only hope the banjo bolts on the Suzuki are a bit better, at lest they are hex bolts, so stand a chance.
The hoses front and rear appear to be good, so I may just try bleeding the system first and see how that goes, changing hoses is not that expensive, and at least I could get rid of the bit across the front mudguard.