The fixed sprit is a big performance improver but you have that. Search this forum for "Fixed Carbon Bowsprit" and you can see all the details on the custom one we added to our Platu. Attached is an image. Since a pole lift is no longer needed on our boat, a small but important change was to remove it and use that exit on the mast for the main halyard instead of having it at the mast step. Raising the dropping the main, with the halyard on the cabin top becomes very easy especially shorthanded.
We explored a new mast but the cost was excessive for little gain ( a bit more stability due to decrease in spar weight = hike harder). The existing spar does NOT have sufficient strength at the tip to handle a masthead chute. Additionally, as noted, the hull and keel do not have sufficient righting moment. Net -net buy a Farr 25 if you like the Platu but want a carbon rig and a masthead chute.
Our sailmaker advised that a fathead main would work; we already have a decent length flicker, so that may be the next move.
All in all, we love the boat, it is a terrific light air flyer.