Well, that H-60 is still around for LAMPs is not surprising. Regarding V-22, it's admittedly too big for the role and was never intended to be based on a DDG or the like. OTOH, that does not rule out the technology. Consider this: Tilt-Rotor or not, what from-scratch medium rotorcraft design has entered US service in the last 40 years besides the V-22? Another reason the H-60 is still around.
Regarding the use of a V-280 derivative for the role in the future... like any good contractor, Bell is going to pitch its technology and designs. It has shown multiple concepts for a naval V-280 derivative and folding is not a show stopping factor. The main penalty of folding is weight, which naturally would be a consideration. Since USN doesn't seem to need all of the V-280's range one tradeoff could fuel. Another option shows up in mission requirements. Specifically, IIRC FLRAA has a requirement to HOGE at mission weight at 6000 ( or is it 6500?)' at 90 (95?) degrees. This, not speed, is what determined the power requirement for the V-280. Navy mission has no such need. Given that, naval V-280 may already have enough power to handle the extra weight of the folding mechanism at lower altitudes.
Regarding fitting on a DDG, Bell has consistently said you'd be able to operate two of them on a DDG. Their published data indicates that a folded naval V-280 has about the same footprint as a folded UH-`Y, so it will certainly fit where an H-60 would go. Given the Army program, it would be very competitive overall pricewise vs a clean sheet design.