This reminds me of an interesting experience I had nearly missing a DA40
I too am used to ATC suggesting climbs, descents or headings for traffic that is expected to pass close to me if I can't get them in sight.
I was in class E airspace 3000ft. ATC calls out VFR traffic at 1900 feet and climbing toward me. They call out to me 3mi, not in sight, 2mi, not in sight, finally the controller calls out target 12 oclock, 1 mile 2800feet, 'targets expected to merge'. At this point I'm looking everywhere for this damn thing and reply "Not in sight, CAN YOU SUGGEST A HEADING" and the controller lazily replies "oh, a right turn about 30 degrees should do it"
Turns out the damn thing was right under my spinner, I saw it when I made the turn and it was way too close, I could have flipped them the bird.
Anyway, don't assume they are going to give you a vector if traffic comes too close and you can't spot it.