I don't think Cirrus need to go to metal to deliver build quality.
It's just that to deliver build quality in composite you have to spend loads of money on tooling. Accurate expensive moulds. Not the sort of "plus or minus a few mm" moulds which Cirrus and Diamond went for, and are only gradually improving on. A properly constructed swimming pool is built to a better tolerance than that
One also needs accurate tooling / jigs for metal but if one doesn't have them one can conceal it, by making the mating parts to fit. Whereas with composites this is harder because the stuff comes out of a mould and there is only so much one can trim in 3D.
What Cirrus (and Diamond) need to do is to greatly improve attention to detail. And underneath the skin they need to use better quality metal fittings. The rapid corrosion just adds to the depreciation.
But maybe the more rapid tired look is an inevitable characteristic of all modern planes, because (like all cars from the last 40 years) they use a lot of trim. A Cirrus that has been kicked around looks rough. But a TB20 that has been kicked around also looks rough, despite being a 20 years older design; it has a fair bit of trim too, which looks crap when it comes loose. And clumsy maintenance (the norm) just knackers it really fast. Whereas you never take off the trims in a car unless you need to fix something - and when you do, they rattle and don't go back properly. Whereas a C182 that has been kicked around looks just like it always used to - a flat instrument panel, minimal trim, and not too much that can look tired. Same with a Mooney - all the old iron looks rather agricultural IMHO
The glass cockpits just make it look a bit weird. Like screwing a G1000 into a Russian combine harvester.